KSI

KSI (Olajide Olayinka Williams “JJ” Olatunji) is a British YouTuber, boxer, rapper, and entrepreneur who has built one of the most diverse entertainment careers of the digital age. Born in London to Nigerian parents, he began his YouTube career in 2009 creating FIFA gaming videos and grew to become one of the UK’s most successful content creators.

KSI co-founded the Sidemen, a YouTube supergroup that became the most subscribed group in UK YouTube history. He pivoted into boxing, first fighting fellow YouTuber Joe Weller in 2018, then having two high-profile bouts against Logan Paul (a draw in 2018, a win in 2019) that helped legitimize influencer boxing.

His music career has produced multiple platinum singles and a number one album. As a businessman, he co-founded Prime Hydration with Logan Paul (his former rival), which became one of the fastest-growing beverage brands in history. He also launched XIX Vodka and has ownership stakes in various ventures. KSI exemplifies the modern multi-hyphenate entertainer, succeeding across gaming, music, sports, and business.