British Actor Simon Pegg has called comedian Ricky Gervais an 'idiot' and made a jibe about his weight.

Pegg made the comments while promoting his new film 'How To Lose Friends And Alienate People' which also stars Kirsten Dunst.

He was being interviewed on the radio by Jamie Theakston and Harriet Scott for London's Heart 106.2.

Pegg was asked by Scott if he, like Gervais, felt under pressure from the LA lifestyle. Pegg responded: "He says a lot of things, that man. He said there'd been no good British films since 1950. What an idiot.

"If you go to LA, you can get sucked into that. I've seen people go there and suddenly become rake-thin because there is a slight pressure on you to be thin. I've seen a lot of fat people there."

Theakston commented that Gervais was apparently not receiving that kind of pressure.

Pegg said: "He's one of the fat people in LA, yes."