Legendary funny man Bill Murray has admitted to GQ magazine that he signed up to play the titular lead in Garfield not for the money, nor the critical acclaim (probably just as well in the latter case) but because he thought he was working from a script by a Coen brother.

It's an easy mistake to make, you see Academy Award winner Joel Coen's name on a script and you automatically think of one half of cinema's greatest director siblings. Garfield, of course, was co-written by Joel Cohen (with an 'h') whose family-movie screenwriting credits include Toy Story, Cheaper by the Dozen and Daddy Day Camp. The closest he's come to Oscar glory was a nomination shared with three others for his work on Pixar's debut feature.

Says Murray: "I looked at the script, and it said, 'So-and-so and Joel Coen.' And I thought: Christ, well, I love those Coens! They're funny. So I sorta read a few pages of it and thought, Yeah, I'd like to do that."

It wasn't until they screened the movie for him that he realised his mistake. "I kept saying, 'Who the hell cut this thing? Who did? this? What the f**k was Coen thinking?' And then they explained it to me: It wasn't written by that Joel Coen."

Of course, it's no secret Murray regrets the gig - it's even the subject of the funniest line he has in the already-very-funny Zombieland. But it's testament to the respect he's afforded within the industry that, even after the fact, he can feel comfortable being honest about it and it doesn't feel like he's causing unnecessary controversy.

Check out the brilliant, full interview on GQ's website.