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Olajide Olayinka Williams Olatunji
KSI in 2019
Olajide Olayinka Williams Olatunji[1][2]

(1993-06-19) 19 June 1993 (age 31)
Height5 ft 10 ½ in (179 cm)
RelativesDeji (brother)[4]
YouTube information
Years active2009–present
Subscribers30.8 million (combined)
Total views7 billion (combined)

Last updated: 7 June 2020
Musical career
Years active2015–present
Nickname(s)The Nightmare[5]
Rated atCruiserweight[5]
Height6 ft 0 in[5]
Reach76 in[5]
Boxing record
Total fights5

Olajide Olayinka Williams "JJ" Olatunji (born 19 June 1993), known professionally as KSI, is a YouTuber, musician and professional boxer. He is a co-founding member of the YouTube group called, Sidemen.

KSI was ranked as the second most influential online creator in the United Kingdom by The Times.[7] He had a boxing match with Lee Corso.

His first studio album, Dissimulation, released in 2020, debuted at number 2 on the UK Albums Chart. His second studio album, All Over The Place, debuted at number 1.

His name “KSI” stands for Knowledge, Strength, Integrity.

KSI is of Nigerian descent.

In his boxing career, he has fought and beaten Joe Weller, Logan Paul, Swarmz, Luis Pineda and Joe Fournier, however he controversially lost to Tommy Fury on 14 October 2023 on Misfits 10.


[change | change source]
  1. "Olajide Olayinka Williams Olatunji". Companies House. Archived from the original on 26 October 2019. Retrieved 26 October 2019.
  2. Rafael, Dan (3 September 2019). "YouTubers Paul, KSI to make pro boxing debuts". ESPN. Archived from the original on 28 October 2019. Retrieved 28 October 2019.
  3. Warwick, Josh (16 October 2014). "Meet the 21-year-old YouTuber who made millions playing video games". The Telegraph. Archived from the original on 29 October 2019. Retrieved 29 October 2019.
  4. 4.0 4.1 Hamdani, Adam (9 November 2019). "KSI net worth: How much does YouTuber earn and how many subscribers does he have?". The Independent.
  5. 5.0 5.1 5.2 5.3 5.4 "BoxRec: Olajide William Olatunji". BoxRec. Archived from the original on 31 May 2020. Retrieved 23 November 2019.
  6. "KSI: 'I wanted to make my parents proud through YouTube'". BBC News. 1 June 2020. Retrieved 20 June 2020.
  7. "The top 100 influencers, ranked". The Independent. 2019-09-08. Retrieved 2020-06-20.