Rachel Bilson and Adam Brody, who recently spent time together in Toronto, have split up.Virtually all of the celebrity magazines are reporting that Bilson, 25, and Brody, 27, ended their relationship several weeks ago.The two stars, who play lovers on The O.C., had been dating for about three years. In recent months, according to sources, they have had an on-again, off-again relationship.

In October, the stars denied rumours of a split and were spotted holding hands as they strolled through Toronto, where Bilson was shooting scenes for the movie Jumper.Last month, Bilson was in Rome to film additional scenes with Canadian co-star Hayden Christensen and there was no sign of Brody.

News of the break-up came after Brody was seen out and about in Hollywood without Bilson.