In the upcoming film "Due Date," Robert Downey Jr. plays the straight man to the zany antics of Zach Galifianakis and a scene-stealing French bulldog named Honey (renamed Sonny by Galifianakis, we're told).
If you've seen the trailer, you know that Downey's character is trying to get home to his wife, who is going to have their baby very soon. Zach's character comes into the mix as an alternate mode of transport, which naturally turns out to be a cross-country road trip that destroys cars, friendships and nerves.
When MTV News caught up with one-half of this new comedic duo at the Los Angeles premiere of the film recently, we asked Downey to compare his two co-stars: Galifianakis and the French bulldog.
"Well, actually, Sonny is supposed to be a boy [and] is largely played by a female dog," the "Iron Man" star explained.
"Honey is her real name," Downey's wife Susan chimed in.
"Right. Honey is a bitch. Sonny is supposed to be this meat stick in the movie, so they pulled in a male dog, and that's how I think of Zach: He's kind of a hermaphrodite hound," Downey said with a smile.
Somehow, we imagine Galifianakis would take that assessment as a compliment. But where might he and the "Hangover" star rank among the great comedic duos in film history?
"I'll know a lot more in a couple hours, but I would say kind of Ashford & Simpson right now," Downey said. "We'll see if we get to Hope and Crosby."
Check out everything we've got on "Due Date."
For breaking news, celebrity columns, humor and more — updated around the clock — visit MTVMoviesBlog.com.