Sidemen sensation KSI boasts an impressive fortune and keeps his romantic relationship under wraps as the YouTube collective continues to thrive.
The group, comprised of online personalities and influencers, shares their YouTube content regularly on Sundays, amassing a substantial online audience. Initially recognized for their gaming content in 2013, the Sidemen later diversified their content and even starred in a Netflix documentary highlighting their achievements.
Notable members have ventured into other ventures as well. JJ, also known as KSI, is set to be a permanent judge on the upcoming season of Britain’s Got Talent.
KSI, as per celebritynetworth.com, has an astounding net worth of $100 million, approximately £80 million. Apart from his online presence, KSI is also a musician and a boxer.
He co-founded the popular drink Prime with Logan Paul, which gained immense popularity, leading to significant financial gains for the star.
According to the BBC, KSI and the Sidemen rank among the wealthiest gamers in the UK.
KSI has enjoyed musical success, with two Brit Award nominations, the latest in 2025 for his track “Thick Of It.” He has collaborated with industry heavyweights like Tom Grennan and Anne-Marie.
In 2024, the 32-year-old performed at Hits Radio Live and Capital’s Summertime Ball in 2025, entertaining sold-out crowds with hits like “Holiday,” “Not Over Yet,” and “Summer Is Over.”
Known by his birth name Olajide Olayinka Williams Olatunji, KSI has also ventured into high-profile boxing matches, including a showdown with Tommy Fury in 2023 following a prolonged feud.
Despite his public persona, KSI keeps his personal life private. Reports suggest he has a long-term partner who prefers to stay out of the limelight.
In a podcast, KSI shared that he met his partner on Tinder, and she works for the NHS, leading a regular nine-to-five life. He respects her desire for privacy and admires her dedication to helping others.
KSI’s alias stands for Knowledge, Strength, Integrity, originating from his gaming days and affiliation with a Halo clan.