Rumored On-Set Hookups: How They Played Out

For better or (usually) worse, see the costars whose close working relationships sparked headlines

CLAIRE, BILLY & MARY-LOUISE

The rumors: In 2003, Billy Crudup was expecting a child with Mary-Louise Parker, his girlfriend of eight years, when reports surfaced that he was secretly dating his Stage Beauty costar Claire Danes – a charge his reps vehemently denied.
The aftermath: Two months before Parker gave birth to the couple's son, Crudup officially ended their relationship and began dating Danes. "That was a choice I made to fall in love," Danes later said of the timing of the romance, which lasted four years. "It's unpleasant to be cast in such an unflattering role, but I just had to remain steadfast."