Sir Alex Ferguson made David Beckham shave his Mohawk off in the Wembley dressing room before a Manchester United game.
Beckham reveals how he had hid his latest haircut under a beanie in the buildup to the Charity Shield clash with Chelsea in 2000.
But when Ferguson saw it, he made his star man get rid of it before letting him out onto the field.
'I walked in the changing room and he hadn't seen it because I was too scared to even show him', he reveals when reliving the 20th anniversary of United's treble season to Otro.
'I'd gone into training the day before with a beanie on, trained in a beanie, gone back, walked in the hotel had a beanie on, had dinner beanie on, breakfast beanie on, bus on way to stadium - beanie.
Then as I got ready for the game I took it off, he said "go and shave it off".
'I giggled and he was like "No, I'm serious. Go and shave it off". So I had to find a pair of clippers and I shaved it off in Wembley stadium. Manager always rules.'
United were beaten 2-0 by Chelsea in the tradition curtain-raiser after goals from Jimmy-Floyd Hasselbaink and Mario Melchiot.
Beckham finally got to unveil his Mohawk haircut at the end of the season when on England duty.