British director Danny Boyle and actress Rosario Dawson have ended their romance, according to a U.K. report.

The Slumdog Millionaire filmmaker was first linked to the Sin City star last year (12) after they worked together on new movie Trance, but they are now said to have parted ways.

A source tells Britain's Sunday Telegraph newspaper, "It's all over. It's very sad, but they always were an unlikely couple, in many ways."

Dawson previously dated Sex and the City hunk Jason Lewis.