Stuck on You (2003)

Bob and Walt Tenor are twin brothers, who not only share a passion for life, but also a liver. Thanks to their teamwork, being conjoined twins is not a handicap to them. But, when Walt's dreams of stardom of acting on the screen and Bob's shyness clashes, they both begin to fall out. This doesn't help when Bob's Internet girl arrives in town, unaware of their handicap, and when Walt gains his own TV show with Cher.