Ricky Gervais has said he couldn't believe his luck at getting to work on the new Muppets movie, Muppets Most Wanted.

He told Bang Showbiz, "I ruined a lot of takes by just laughing. One I went, 'Hah, I'm in the Muppets' . . . 'Cut, yes you are in the Muppets, let's do that again, don't say that though'. I can't believe my luck, I'm a big kid."

Gervais added that the song and dance numbers worried him, "It's funny because the frsit thing that worried me in the script is the song and dance number.

"I'm ok at singing, I'm a failed pop star. I always sneak in a song, I wrote songs for [Office character] David Brent, still doing it, wrote a song for David Bowie for Extras, wrote a song for Sesame Street with Elmo. Dancing - a little bit awkward.

"And then I think, 'It's alright, there's going to be a frog on screen dancing. They're not going to care what you're doing with your clumsy little short legs'. So I got away with it."

Muppets Most Wanted is in cinemas now.

Click on the link above to watch RTÉ Ten's interview with The Muppets.