18 Celebrity Relationships That Started As Affairs
Claire Danes and Billy Crudup
When Claire and Billy worked on Stage Beauty together, it was love at first sight. But there was just one problem: Billy had a girlfriend and it was star Mary-Louise Parker, who was seven months pregnant with his child. Somehow, Billy still thought it was appropriate to start an affair and then leave Mary-Louise for Claire. But their relationship didn’t last. Claire moved on to Hugh Dancy, whom she married in 2009, and Billy is now single.