David Beckham reveals how Sir Alex Ferguson made him shave his mohawk off in the Wembley dressing room as he hails the 'ruthless' manager he still calls 'the boss'

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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 hat in the build-up 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.

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David Beckham has relived how Sir Alex Ferugson made him shave his mohawk before a game

Ferguson made him get rid of the haircut in Wembley changing room before Charity Shield

'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". 

Beckham and his United team-mates were beaten 2-0 by Chelsea in the showpiece match

'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 traditional 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.

He believes his run-in with Ferguson would not happen in the modern game, where extravagant haircuts and tattoos have become commonplace.

'It's a lot more normal to do it these days, it's a lot more normal to have a mohawk or a tattoo on your neck or wear coloured boots. 

Beckham finally got to show off his mohawk haircut on England duty nearly a year later

Beckham showed off the haircut ahead of a World Cup qualifier in Greece in June 2001

'When we were growing up the manager wouldn't let us even step on a pitch wearing a pair of red boots or a pair of white boots. 

'Simple as that. Things like that have definitely changed. 

The 44-year-old admits that he has been a dedicated follower of fashion since he was a child.

'Even when I was seven-eight years old I wanted to go to a barbers and have my hair cut in a certain way that nobody else had or I always wanted to wear something that was different to what my mates were wearing.'

'20 Years On: Premier League' is available from May 16, with further episodes to celebrate Manchester United's Treble-winning season released until May 24. Watch the episodes at otro.com/beckham