They have been together weathered a cheating scandal, but it seems time does not heal all wounds.

As rumors of relationship trouble continue to swirl, a source tells PEOPLE that Robert Pattinson and Kristen Stewart have called it quits after more than three years of dating.

But sources insisted to the magazine it may just be a temporary split for the Twilight Saga co-stars.

On Monday, it appeared Kristen had left her Los Feliz, California, home that she shares with the English actor.

Despite it being Robert's 27th birthday, Kristen stayed at a friend's house just down the road from her own home.

She was seen driving with a friend around the area - and even appeared to be tearing up at one point.

The Twilight co-stars were expected to attend Cannes Film Festival in France together last week, however neither star has been photographed at the festival.