Katherine Heigl's 'Ugly Truth'

Katherine Heigl and Gerard Butler face off in their new frothy comedy, and Katherine reveals her 'Ugly Truth' to ET!Katherine Heigl faces off with '300' hunk Gerard Butler in the new comedy 'The Ugly Truth,' in theaters Friday, and the "Grey’s Anatomy" star waxes poetic to ET's own Mark Steines about her sexy co-star, how men are still from Mars and women are still from Venus — and will they ever understand each other? "No," she says flatly. "But I think there is hope that we can maybe come to some sort of middle ground. When you really love someone you will definitely make the sacrifice for certain things. I will compromise a little of my uptightness, and [my husband] Josh will compromise his golf." In the movie, Katherine plays Abby, a high-strung and romantically challenged morning show producer whose search for Mr. Perfect has left her hopelessly single. When hardcore TV personality Mike Chadway (Butler) enters the picture, Abby is in for a rude awakening, as Mike pulls no punches -- on air and off -- about the ugly truth on what makes men and women tick. Will their immediate friction create sparks? Or will someone go down in flames?