English funnyman David Walliams left producer Mark Ronson fuming after wrestling him to the floor and taking off his underpants at a charity event.

The comedian gave a stand-up performance at the Concert For CARE show at the O2 Academy, Brixton, before inviting his celebrity friend on the stage.

The Little Britain star, 38, went on to grab Ronson’s genitals and “threw him on the floor, pulling at his trousers as the musician desperately fought to protect his modesty”, reports the Daily Express.

He removed the angry producer’s underwear telling him, "It's just a bit of fun, Mark!" before letting him get to his feet.

The show also saw performances from Take That star Gary Barlow and British rockers Kaiser Chiefs.