Robert Pattinson and Taylor Lautner make an appearance on The Ellen DeGeneres Show tomorrow, but lucky for you, we've got a sneak peek at their interview! The boys chat about Breaking Dawn, their wax figures, Rob's dog and the actor's struggle to keep his fly up, and at the end of the show, Ellen gives the boys a half dozen pairs of colorful underwear!

Rob and Taylor talk about shooting both Breaking Dawn films simultaneously, but that hasn't always been the case with Twilight, as the cast and crew took nearly a year off between the first film and New Moon. Rob joked, "The gap between the first and the second one that was when Taylor left the first film a 15-year-old little boy with a long wig and he came back like a Chippendale!" Rob certainly knows how to make his co-stars blush!

While Ellen didn't bring up Kristen Stewart during the sit-down, she did ask about the dog the two adopted last year. Check out the video below to see what Rob had to say about his pup ... and keeping his pants zipped!