Olajide Olayinka Williams Olatunji (Professionally known as JJ Olatunji and KSI) is an English Influencer, Entrepreneur, Professional Boxer and Musician who served as a guest judge on the eighteenth series of Britain's Got Talent due to other commitments held by Bruno Tonioli during some of the late 2024 audition tapings and due to Simon Cowell taking a break during some of the other late 2024 tapings.
KSI is best known as an influencer and a member of the group Sidemen who predominantly create content on YouTube. KSI is also a boxer who has been partaking in professional boxing since 2017, though he would take a break between 2019 and 2022 to focus on his music career. KSI released the studio albums Dissimulation, All Over the Place & Caught in Two Minds, whilst also featuring on Randolph’s album entitled New Age. As an entrepreneur, KSI founded Misfits Boxing and co-founded Prime Hydration, LLC. alongside Logan Paul in 2022, before founding Lunchly alongside both Logan Paul & MrBeast in 2024.
In terms of documentaries, KSI has appeared on Minecraft: Into the Nether, KSI: Can’t Lose, Beast Mode On, Talk to Me, KSI: In Real Life, Untold: Jake Paul the Problem Child, The Spy Who Loved Eggnog & The Sidemen Story. As an actor, KSI played the lead role of Duncan in the 2016 movie Laid in America, Tola in the 2019 short film Test Case & Candy Cane Capone in the 2023 short film The Naughty List.
On television, KSI has appeared on The Gadget Show, Friday Download, Rise of the Superstar Vloggers, Saturday Mash-Up!, The Big Narstie Show, Gogglebox, Celebrity Gogglebox, Top Gear, Sport Relief, The Playlist, The Great Stand Up to Cancer Bake Off (as a Contestant), Blue Peter, All or Nothing: Arsenal, Wrestlemania 39 and WWE Smackdown.
In 2016, KSI appeared in the video games KSI Unleashed, before appearing in the video game Boxtuber in 2018. In 2021, KSI held an album launch party for his second album entitled All Over the Place within the video game Roblox.
In terms of web exclusive content, KSI has played Matt Clark in 2014’s Five-A-Side and Curly otherwise known as Curl in the Bad Weather Films episode entitled Parkour Boys. KSI has appeared as himself in the web exclusive content KSI: Demolished, The Sidemen Experience, YouTube Rewind, Pass the Pad, The Sidemen Show, Formula E Voltage, Does the Shoe Fit, The Creator Games (1 & 2), The Chase: Sidemen Edition & the MrBeast video 50 YouTubers Fight for $1,000,000 and served as the host of the Sidemen created reality show InSIDE.[1]
Preferred Acts[]
KSI is mainly looking for acts which he think could go viral on video sharing platforms such as YouTube, where he himself first found a level of fame and acclaim. Any acts who KSI may judge harshly are likely as a direct result of the fact that he does not personally believe that their performance would see them go viral.
Other Appearances[]
Golden Buzzers[]
2025 (First Golden Buzzer): Stacey Leadbeatter
2025 (Second Golden Buzzer): TBA
Judges Golden Moments[]
2025: TBA
Trivia[]
- KSI previously judged Series 15 contestants Matricks Illusions & Sam Goodburn on Sidemen’s Got Talent.
- First act to vote 'Yes' to: RuMac
- First act to 'Buzz': Sarah & Meatball
- First act to vote 'No' to: Sarah & Meatball
- First act to 'Buzz; and still vote 'Yes' to: TBA