KSI is 32 years old as of 2026.

Quick Scoop

  • Full name: Olajide Olayinka Williams “JJ” Olatunji.
  • Birthday: 19 June 1993.
  • Age right now (2026): 32 years old.
  • From: Watford, Hertfordshire, England.
  • Known for: YouTuber, musician/rapper, boxer, and member of the Sidemen.

KSI turned from a FIFA YouTuber in the early 2010s into a multi-industry entertainer, juggling music charts, headline boxing events, and Sidemen content that still pulls massive views.

Why people keep asking “how old is KSI?”

  • He’s been online since he was a teenager, so many long-time viewers still picture him as that loud FIFA kid even though he’s now in his early thirties.
  • His career keeps “resetting” with new audiences through boxing events, TikTok clips, and Sidemen highlights, so younger fans often meet him without knowing his original YouTube era.

Mini timeline

  1. 2008–2012: Starts uploading gaming videos (FIFA skills, commentaries) and grows a strong UK fanbase.
  1. Mid‑2010s: Becomes one of the UK’s most influential YouTubers and co-founds Sidemen.
  1. Late 2010s–2020s: Expands into music and high-profile boxing matches, reaching a global mainstream audience.

TL;DR: KSI (born 19 June 1993 in Watford) is 32 years old and still very much in his peak content and crossover-entertainment era.

Information gathered from public forums or data available on the internet and portrayed here.