ET sat down with Jennifer Aniston and Owen Wilson, the stars of the new doggy comedy 'Marley & Me,' and it seems Owen has some bones to pick with some of his scene stealing co-stars!

The actor tells ET's Thea Andrews about competition on set during filming.

"They're like scene stealers," Owen jokes about his co-stars. "Don't work with dogs, Jen, or babies if you want any face time."

The funny man enjoyed not being the main focus of one particular part of the film, a skinny dipping scene!

"That was kind of a good day of filming," Owen says. "That's where I got to say it's a tough job but somebody's got to do it."

Watch the video to hear more stories from Jennifer and Owen on their experience with their four-legged co-stars.

Check out 'Marley & Me,' in theaters Christmas day.