Ben Affleck bares all (and we mean ALL) in his new film!

Ben Affleck is a brave man! Not only was he willing to put his manhood on show for a new film, but he chose to do it for the biggest films of the year.

The actor revealed that he got totally full frontal during one blink-and-you'll-miss-it scene in Gone Girl, which hits cinemas tomorrow.

"There is some very brief nudity…This is a warts and all movie," he explained in an interview. 

"It can have no vanity. You have to see the naked underbelly of this character." 

And, in case you were under any illusion about what to expect, Ben pretty much spelled things out. "The penis is in there!" he said during the chat.

"It costs extra. It's IMAX penis! You've gotta pay fifteen bucks to see it in 3-D," he joked. "It looks better in 3-D."

Of course, if you think Ben's looking a little bit… petite… there' s a reason for that. "It was a very cold set. It was freezing. It was subzero," said the actor. Suuuure!