KSI, Sidemen
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Influencer and Britain’s Got Talent judge had made football, comedy and challenge videos with group since 2013
One of British YouTube's most defining partnerships has ended: KSI, co-founder and figurehead of the Sidemen, announced on 31 May 2026 that he is leaving the group he helped build from a bedroom gaming channel into a £100 million ($127 million) media empire,
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Why is KSI leaving The Sidemen? Fans joke 'it's a forfeit after Arsenal's Champions League final loss against PSG'
KSI has announced he is leaving the Sidemen, citing burnout, work-life balance, and a desire to focus on his health, family, and personal life. Despite his emotional explanation, many fans believe the exit is a joke or forfeit linked to Arsenal's Champions League final defeat to PSG.