Millions tuned in to see KSI beat Joe Weller in the biggest amateur boxing match of all time. But what didn't they see? The blood, sweat and determination underpinning KSI's intense training regime and a revealing look at his world off camera. This is the exclusive and never before seen story of Knowledge, Strength and Integrity, and how JJ, with 18m YouTube subscribers, went from actor to athlete.
KSI
as Self
Joe Sugg
as Self
Simon Minter
as Self
Josh Bradley
as Self
Vikram Barn
as Self
Ethan Payne
as Self
Tobi Brown
as Self
Harry Lewis
as Self
Deji Olatunji
as Self
Yinka Olatunji
as Self
Jide Olatunji
as Self
Jack Whitehall
as Self
