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Creator / KSI

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Olajide Olayinka Williams "JJ"note  Olatunji (born 19 June 1993), better known as KSInote , is an English YouTube personality, musician, boxer, comedian and actor, as well as a founding member of the Sidemen, a group of British YouTube entertainers.

KSI pretty much became the face of the FIFA fandom in the UK during the early 2010s, as football (not soccer) is Serious Business for many people there, with his first popularity resulting from a "mini-series" in which he discussed what was wrong with FIFA 11 and what could be improved in the succeeding edition. Nowadays, he stands as the owner of the biggest individual YouTube channel in the United Kingdom, with over 21 million subscribers on his primary channel and over 2 billion views on his videos.

While KSI mainly uploaded videos to his primary channel for a long while, using his second channelnote  to post content from a wider variety of games (often played with the Sidemen), his pursuit of a music career turned the main KSI channel into a professional hub of official music videos, singles and miscellaneous high-production-value content. His second channel, now updated more frequently, hosts fun and informal content; think of it as JJ the regular person, as opposed to KSI the superstar. Recurring content on this channel includes Try Not to Laugh (where he reacts and almost always fails to avoid laughing at funny videos), Well...That Was Weird (where he reacts to simply bizarre videos), and a regular series of him reacting to fanmade content on his subreddit (available here). In March 2021, he (alongside many other Sidemen) also started another channel dedicated to short highlights of videos he's been in.

As far as music goes, KSI's career began early in his YouTube days with a series of comedic FIFA-based songs made with his rapper-producer friend Randolph before doing guest verses on several songs by British rapper Sway. He released EPs between 2016 and 2017, and transitioned to full-length albums around the end of the 2010s, one of them a fully collaborative work with Randolph (New Age). As his discography has progressed, he has gotten more serious with his craft, expanding his hip-hop sound to work with influences from R&B, pop, and dance music, racking up collaborations with established UK and US artists, and seeing a considerable increase in public support of him as a professional artist as opposed to making "YouTuber music".

Another prominent career path KSI has taken is into the world of boxing. His first fight was an amateur fight on 3 February 2018, when he settled a months-long beef with fellow British YouTuber Joe Weller in the ring at Copper Box Arena, ultimately winning in what was one of the most-watched white-collar matches in boxing history. In the years since, he has fought six more opponents — Logan Paul (who he fought twicenote ), rapper Swarmz, pro boxer Luis Alcaraz Pinedanote , YouTuber FaZe Temperrrnote , pro boxer Joe Fournier, and pro boxer Tommy Fury. His current professional recordnote  is 4-1-0-1, consisting of one split decision victory, three KO victories, a "no decision"note , and a loss by unanimous decision.note  KSI is additionally the CEO of the boxing promotional company Misfits Boxing.

KSI also released an autobiography in 2015 titled I Am a Bellend (or I Am a Tool in the United States), co-starred in the 2016 direct-to-video comedy film Laid in America alongside British YouTuber Caspar Lee, served as the focus of two documentaries titled KSI: Can't Losenote  and KSI: In Real Lifenote , and announced co-ownership of a hydration brand called Prime in 2022 alongside Logan Paul, following the two squashing their beef and becoming friends.

He can be found on Facebook, Twitter and Instagram. He also has an official shop.


  • Keep Up (EP; 2016)
  • Jump Around (EP; 2016)
  • Space (EP; 2017)
  • Disstracktions (EP; 2017)
  • New Age (collaboration with Randolph; 2019)
  • Dissimulation (2020)
  • All Over the Place (2021)

KSI and his channel incorporates the following tropes:


Video Example(s):

Alternative Title(s): KSI Olajidebt, JJ Olatunji


Bye Bye KSI

KSI joined Logan Paul at Wrestlemania and dressed in a costume to advertise their sports drink, Prime. KSI and Paul wanted to create a viral moment of Paul doing a frog splash on Seth Rollins while KSI bragged in the foreground, but Rollins reverse the plan on them.

dressed up in an ad costume for Prime, joined his

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