Who’s the former "American Idol" star wearing a wedding gown? Why it's none other than Katharine McPhee, starring in the romantic comedy 'You May Not Kiss the Bride,' and ET is with her on the set! Due out next year, the film is currently lensing in breathtaking Hawaii, and Katharine tells ET, "We're having so much fun, we can't even believe we're here working." In the movie, Katharine plays the daughter of a Croatian mobster ('Borat' star Ken Davitian) who tries to obtain U.S. citizenship by setting her up with an American photographer (Dave Annable of 'Brothers & Sisters'). Of course, the pair begin to fall in love, much to the chagrin of her father. Mena Suvari and Vinnie Jones also star in the comedy, written and directed by Rob Hedden. The film is produced by Hawaii Film Partners.