Rachel McAdams is rumoured to have split from Michael Sheen after two years together.
The To The Wonder actress and Twilight star Michael first met when they worked together on Woody Allen's Midnight In Paris in autumn 2010, and went public with their romance promoting the film at the Cannes festival in May 2011.
But sources have told UsMagazine.com that Rachel, 34, and Michael, 44, have called time on their relationship.
Rachel has previously admitted that their long-distance romance was not easy.
She said: "Michael and I never spend more than three weeks apart - we rack up a lot of air miles - but you have to be quite adaptable in this business whether you are in a relationship or not. Trying to establish roots somewhere is a bit of a joke."
Michael has a 14-year-old daughter Lily from his eight-year relationship with Kate Beckinsale.
Rachel previously dated Ryan Gosling, who she starred alongside in The Notebook, but they split in 2007.