Age, Biography and Wiki
KSI (Olajide Olayinka Williams "JJ" Olatunji) is an English influencer, professional boxer, and musician, born on June 19, 1993, making him 31 years old as of May 2025. He is best known as a co-founding member of the YouTube group the Sidemen, CEO of Misfits Boxing, and a successful recording artist.
Originally from Watford, Hertfordshire, KSI registered his main YouTube channel in 2009, gaining fame through gaming-commentary videos, especially for the FIFA series. His content later diversified to include vlogs and comedy, helping him amass over 34 million subscribers and more than 8 billion views across two channels. As a boxer, KSI began with amateur bouts, including a widely viewed match against fellow YouTuber Joe Weller in 2018, and later faced Logan Paul in a professional bout. In music, he has achieved multiple top 10 singles in the UK and released a debut studio album, Dissimulation, in 2020, which debuted at number 2 on the UK Albums Chart.
| Occupation | Musicians |
|---|---|
| Date of Birth | 19 June 1993 |
| Age | 31 Years |
| Birth Place | London, England |
| Horoscope | Gemini |
| Country | England |
Height, Weight & Measurements
While official sources do not always confirm exact measurements, KSI is reported to be around 6 feet tall (approximately 183 cm) and has weighed between 170–185 lbs (77–84 kg) depending on his boxing training period. These figures are typical for his height and competitive weight class in professional boxing.
Creating hip-hop music as early as 2011, he first achieved commercial success with "Lamborghini" (featuring P Money) in 2015. His debut EP, Keep Up (2016), topped the UK R&B Albums Chart. He released his debut studio album, Dissimulation, in 2020, which peaked at number two on the UK Albums Chart. His second studio album, All Over the Place (2021), debuted at number one and was certified platinum by the BPI; its lead singles "Don't Play" (with Anne-Marie and Digital Farm Animals) and "Holiday" both debuted at number two on the UK Singles Chart and were nominated for Song of the Year at the Brit Awards. He has achieved fourteen top 40 singles in the United Kingdom, with seven peaking in the top 10. He received the Brit Billion Award in 2024, for amassing over one billion music streams in the United Kingdom. He also starred in the direct-to-video comedy film Laid in America (2016), and has been the subject of multiple documentaries, including Amazon Prime Video's In Real Life (2023).
On 19 November, it was announced that KSI would face Dillon Danis as the headliner of MF & DAZN: X Series 004 on 14 January 2023, at Wembley Arena, London, England. However, on 4 January, Danis withdrew due to lack of preparation, a lack of a coach, and issues with the contracted weight. It was announced that KSI would defend his MF cruiserweight title against Brazilian YouTuber and FaZe Clan founder FaZe Temperrr, replacing Danis within a weeks notice. KSI defeated Temperrr via 1st round KO and retained his MFB cruiserweight title.
| Height | 183 cm |
| Weight | 185 lbs |
| Body Measurements | |
| Eye Color | |
| Hair Color |
Dating & Relationship Status
As of 2025, KSI has been relatively private about his dating life. There have been no official confirmations of a current long-term relationship from KSI himself, but occasional social media posts and paparazzi photos have fueled speculation. He has previously been linked to various public figures, but any current dating status is unconfirmed and he has not publicly announced a partner.
Born in London to parents of Yoruba heritage and raised in Watford, KSI was privately educated at Berkhamsted School. He registered his main YouTube channel KSI—then known as KSIOlajidebt—in 2009 and built a following through his commentary videos of the FIFA video game series. His content later diversified to include vlogs and comedic skits. In 2019, he was ranked second by The Sunday Times in its list of most influential online creators in the United Kingdom. In 2021, he was listed in the Europe Entertainment category of Forbes 30 Under 30; he was later ranked by Forbes as the second-top creator of 2023. As of January 2025, he has over 44 million subscribers and 14 billion video views across his three active YouTube channels.
His mother, Olayinka Olatunji (née Atinuke), is from Islington, London. He and his parents are from the Yoruba ethnic group. He was educated at Reddiford School in Pinner and Berkhamsted School in Berkhamsted, where he met future collaborator and Sidemen member Simon Minter.
KSI registered his first account on YouTube under the username "JideJunior" in 2008 while in his early teens. He registered his current YouTube account on 24 July 2009 under the name KSI Olajide BT, where he uploaded gaming–commentary videos of the FIFA video game series from his bedroom at his parents' house in Watford. "KSI" stands for Knowledge Strength Integrity, which was taken from a Halo clan.
He dropped out of sixth form college to pursue his YouTube career once he was earning steady monthly revenue from his uploads. In an interview in 2014, he recounted asking his teacher whether he should drop-out. His teacher asked how much KSI was making from YouTube, to which KSI answered, "around £1,500 a month", which was more than his teacher earned. His parents initially disapproved, but later became supportive and featured in a number of his videos. KSI later uploaded more vlog-style content and played a variety of games and in 2012, the channel reached a million subscribers.
During the broadcast of X Series 17, KSI stated he was eyeing to return in early 2025. On 3 January 2025, Misfits Boxing announced that his return would be announced during the broadcast of X Series 20 on 18 January. News broke hours before the announcement that former England and Premier League winning left-back Wayne Bridge is being lined up to face KSI for 29 March. On the night, KSI came into the ring and revealed his original opponent withdrew, leading into a face off with Bridge. On the night, KSI came into the ring and revealed his original opponent withdrew, leading into a face off with Bridge. The pair got into a brawl after KSI pushed Bridge and brought up John Terry and Bridge's former girlfriend Vanessa Perroncel. However, two days later Bridge withdrew from the bout due to the comments made by KSI about Perroncel. On 4 February, it was announced that American mixed martial artist Dillon Danis—who KSI was originally scheduled to face at X Series 004—would replace Bridge and headlined X Series 21 – Unfinished Business at Manchester Arena in Manchester. On 21 March, it was announced that the fight will be postponed due to KSI suffering from an illness. On 4 April, Misfits Boxing co-president Mams Taylor confirmed on X that X Series 22 – Blinders & Brawls was moved from April 12 to May 16, and will be their next event, confirming that X Series 21 – Unfinished Business was no longer happening.
| Parents | |
| Wife | |
| Sibling | |
| Children |
Net Worth
KSI's net worth is estimated to be in the range of $25–30 million. This figure is derived from his multiple revenue streams, including YouTube, music sales, boxing events, his own business ventures, and endorsements. His role as CEO of Misfits Boxing and his continued success in music and entertainment have significantly contributed to his wealth.
On 28 July, it was announced that KSI and Logan Paul would both headline MF & DAZN: X Series 10 – The Prime Card on 14 October at Manchester Arena in Manchester, England. On 30 July, it was announced that KSI would in fact be facing Tommy Fury. Fury defeated KSI via a majority decision. On 15 October, the results were changed to a unanimous decision victory for Fury due to judge Rafael Ramos, who had previously scored the bout 57-57 on the scorecard, which was mathematically incorrect. The event generated 1,300,000 pay-per-view buys, making it one of the largest boxing events in 2023.
In June 2021, KSI announced that he and Wasserman Boxing had partnered up to launch a boxing promotional company called 'Misfits Boxing'. The first event was scheduled to take place on 27 August 2022, with KSI also set to make his boxing return as the main event. A series of other boxing events titled "MF & DAZN: X Series" in collaboration with DAZN, who were the distributors for KSI's previous rematch against Logan Paul, was announced, along with events to follow, marking the KSI vs Swarmz and Luis Alcaraz Pineda event as MF & DAZN: X Series 001. On 10 January 2023, it was announced that Misfits Boxing and DAZN had signed a 5-year deal to continue distribute events with two pay-per-view each year.
In 2018, Esquire magazine reported that, according to Social Blade, KSI can make up to £250,000 in advertising revenue from one video and that product endorsements on his social media cost around £75,000. Heavy reported in the same year that KSI was the director of three UK companies with equity totalling £1.7 million ($2.2 million).
Business Insider reported that KSI's amateur boxing match versus Logan Paul in 2018 generated around £8.5 million ($11 million) from pay-per-view revenue alone and a further live gate revenue of over £2.7 million (US$3.5 million) from ticket sales. Some estimates calculated the potential earnings from the fight at £30million to £40million each, but KSI dismissed these claims, stating that his earnings were "a high amount" but "nowhere near £40million or £20million". Forbes reported that KSI was contracted to earn a minimum amount of $900,000 from his second fight against Logan Paul in 2019.
In an interview with Men's Health in 2020, KSI confirmed that he owns over ten properties "all around England" with a combined worth of over £10 million. In 2020, The Sunday Times estimated KSI's earnings to be £12 million a year; a year later, they believed that his estimated earnings had gone up by another £13 million.
Social Network
KSI is highly active across multiple social media platforms:
- YouTube: Over 34 million subscribers on his main channel; additional channels for music and other content.
- Instagram: Millions of followers; frequent updates, behind-the-scenes content, and music promotions.
- Twitter/X: Large following; used for announcements, interaction with fans, and humor.
- TikTok: Growing presence, sharing short-form content and music snippets.
- Other: Presence on platforms like Facebook and Twitch, with regular engagement across all channels.
Olajide Olayinka Williams "JJ" Olatunji (born 19 June 1993), better known by his online alias KSI, or JJ is an English influencer, professional boxer, and musician. He is a co-founding member of YouTube group the Sidemen, the CEO of Misfits Boxing, and the co-owner of several businesses, including Prime Hydration and Lunchly.
KSI's younger brother, ComedyShortsGamer, is also a YouTuber previously known as ComedyShortsGamer, and professional boxer. The brothers ranked first and second respectively as the "UK's Most Influential YouTube Creators" by Tubular Labs in 2015.
KSI's rise to fame was not without controversy, with him being widely criticised for his self-described 'rape-face', a recurring joke on his channel during 2012 and 2013. He was the centre of a controversy following third-party allegations of sexual harassment of female staff at a Eurogamer event in 2012, that went so far as accusing him of sexually assaulting a spokesmodel Brandy Brewer, despite her tweeting that she consented to the motorboat, writing, "it's called comedy……relax". As a result, Microsoft cut ties with KSI and he was banned from Eurogamer events. KSI subsequently apologised "for any offence the video of 15 months ago may have caused in the short time it was on his YouTube channel, references to it since and subsequently used by other people" and stated his desire to move on from the incident and "be judged on the great content and value he gives to brands and partners, without controversy."
In October 2013, KSI signed with Maker Studios' sub-network, Polaris. Since 19 October 2013, KSI has been part of the British YouTube group known as the Sidemen. The group produces online videos, most often consisting of challenges, sketches and video-game commentary, as well as selling exclusive Sidemen merchandise.
In July 2014, KSI and Comedy Central UK launched KSI: Demolished, a five-episode comedy roast web series in which British comedians such as Kojo, Michelle de Swarte, Bobby Mair, and Alex Lowe, take turns to roast KSI. In August 2014, KSI was the fourth most popular personality among U.S. teenagers, according to a survey done by Variety. On 18 August 2014, KSI teamed up with Endemol for a new sports show called Rule'm Sports. In October 2014, KSI signed with MLG.tv, a streaming media service focused on gaming and esports, as part of the roster of live streamers. In September 2015, KSI was ranked 15th on Business Insider's list of "The 15 most popular YouTubers in the world". A year later in November 2016, he was ranked first on Business Insider's list of "The 19 biggest British YouTube stars".
In 2019, he was ranked second by The Sunday Times in its list of the top 100 UK influencers. In 2020, The Times named KSI to be Britain's biggest influencer. In April 2021, he was listed among Forbes 30 Under 30 Europe 2021 Entertainment list. In September 2023, Forbes ranked KSI as the second top creator of 2023, earning an estimated $24 million. In July 2024, KSI appeared in a YouTube video challenge by American YouTuber MrBeast titled "50 YouTubers Fight for $1,000,000".
Having written and produced comedy–rap songs for his YouTube channel in 2011, KSI released his debut single, "Lamborghini", featuring British grime MC P Money, on 23 March 2015, with Dcypha Productions. The song charted at number 30 on the UK Singles Chart, and It dropped to number 68 and number 96 over the following two weeks, before dropping out of the top 100.
On 4 November 2019, it was announced that KSI had signed with RBC Records and BMG to "take [his] music to the next level" and "further develop his music career in the US and internationally". In addition to managing KSI's future releases, it was confirmed that the label would be administering and reissuing KSI's independent catalogue recordings. That day, it was confirmed that KSI had already started recording his debut studio album. On 8 November 2019, "Down Like That", featuring Rick Ross, Lil Baby and S-X, was released as the album's lead single. It was performed live by the three featured artists as KSI's entrance music for his boxing rematch against Logan Paul.
On 23 October 2020, KSI released the first single from his second album, "Really Love" featuring Craig David and Digital Farm Animals, which peaked at number three on the UK Singles Chart and has been certified gold by the BPI. On 15 January 2021, KSI released the album's second single, "Don't Play" with Anne-Marie and Digital Farm Animals. The song debuted at number two on the UK Singles Chart, becoming KSI's highest-charting single in the UK to date, and has been certified platinum by the BPI. On 12 March 2021, KSI released the album's third single, "Patience" featuring Yungblud and Polo G, which debuted at number 3 on the UK Singles Chart and has been certified silver by the BPI. On 26 April 2021, KSI announced via his social media the release of his second album All Over the Place, which was released on 16 July that year. It debuted at number 1 on the UK Album Charts, giving KSI his first-ever chart-topper, and has been certified gold by the BPI for surpassing 100,000 sales in the country. On 18 June 2021, KSI released the album's fourth single, "Holiday", which was only featured on the platinum edition of the album. The song debuted at number 2 on the UK Singles Chart, making it KSI's highest-charting solo single to date. On 6 August 2021, KSI released the album's fifth single, "Lose" with American rapper Lil Wayne, and was the lead single for the deluxe edition of the album, which was released on 27 August. The single peaked at number 18 on the UK Singles Chart and also debuted at number 86 on the Billboard Hot 100, becoming KSI's first ever single to enter that chart.
Supposed hostilities between KSI and British YouTuber Joe Weller began towards the end of 2017. Following public disagreements on Twitter and diss-tracks between the pair, they announced that they would host an amateur boxing match on 3 February 2018 at Copper Box Arena, London, to settle the feud. During the announcement, the pair confronted each other, with KSI mocking Weller's struggles with depression and his use of antidepressants for which he later apologised.
On 19 October, KSI submitted an appeal to the Professional Boxing Association (PBA). On 1 December, the PBA announced on Twitter that they had rejected the appeal, stating there were "no grounds" to overturn the result. Despite the result, KSI's manager Mams Taylor stated that the appeal is still ongoing and that they are moving into the second of three possible stages.
On 2 June 2024, KSI confirmed on Twitter that he would return to the ring in August after a 10-month break from the Fury loss in October of last year. Reports began to state that KSI was in negotiations to face former unified light welterweight champion Amir Khan. On 4 June, Khan confirmed the negotiations. However, on 8 June KSI confirmed in a YouTube video that Khan will not be his opponent but potentially for later in the year. In that video, KSI also confirmed he will be fighting on 31 August 2024, in Dublin, Ireland, and challenged American internet personality Slim Albaher and American mixed martial artist Anthony Taylor to a 2 vs. 1 outnumbered tag team match. On 30 June 2024, the bout between KSI, Albaher and Taylor was confirmed. However, fans began to speculate if the bout had been cancelled following KSI deleting the bout announcement across his social media. On 1 August, KSI confirmed his withdrawal in a Twitter post due to an injury sustained.
In 2018, KSI released a documentary film titled KSI: Can't Lose. The film reveals the behind-the-scenes story of what led KSI to become the YouTube champion of the world after his boxing debut fight against fellow YouTube star Joe Weller and how KSI will use what he learned to fight Logan Paul. The film was produced by fellow YouTuber Callux's film studio, After Party Studios, and was distributed by Sony Pictures Home Entertainment.
In February 2021, KSI announced on Twitter the creation of his own record label named "The Online Takeover" in partnership with his music manager Mams Taylor. Shortly after, he announced the first signee of his label, which was American-British singer Aiyana-Lee, who featured on the track "Killa Killa". On 13 May, KSI announced that he and Proper Loud have signed Yxng Dave to The Online Takeover, marking him the second artist to be signed to the label.
In March 2021, KSI faced criticism for misgendering a trans person and using a transphobic slur in a Sidemen video. He later apologised, claiming not to have known that the word was offensive. In April 2023, KSI used the racial slur "Paki " in a Sidemen video parodying the British game show Countdown. He later apologised on Twitter and announced he was taking a break from social media. The video has since been removed. He then visited the Al-Hikam Institute, a mosque in Bradford, to "educate himself", where he apologised again for the hurt and disappointment he had caused.
Education
KSI attended Berkhamsted School in Hertfordshire, later enrolling at the University of Birmingham, where he studied business and economics before leaving to focus on his YouTube and entertainment career. His early educational background helped shape his business acumen, which is evident in his entrepreneurial ventures and company leadership.
