Amanda Seyfried and Dominic Cooper started dating after they met on the set of "Mamma Mia!" but they said in 2010 they were "taking a break."
Dominic Cooper is her now ex-boyfriend and according to E! News it is a fact that he cheated on Amanda with Lindsay Lohan at Cannes, but Amanda suggests there were other problems too.
Amanda thought Dominic was officially broken up with his ex, but was wrong.
“I was just kind of foolishly thinking that the two of them were done and Dom and I were involved,” she explained. “But we weren’t really as involved as I thought. So I got my heart broken pretty hard.”