Bridget Moynahan,Heather Graham in Gray Matters (2006)

Sibling dance partners Gray (Heather Graham) and Sam (Tom Cavanagh) spend so much time together that they decide to enliven their social lives by seeking out singles for companionship. When they enjoy a night on the town with Charlie (Bridget Moynahan), Sam quickly falls in love and proposes marriage. The hitch? Gray realizes she's fallen for Charlie, too! Hip romantic comedy co-stars Molly Shannon, Alan Cumming, and Sissy Spacek. 96 min