Kiefer Sutherland has rekindled his romance with his ex-wife Kelly Winn, according to U.S. tabloid reports.

The 24 star split from the former model in 1999 after three years of marriage, but he only filed for divorce in 2004.

Their union was legally declared over in May 2008 but their love for one another has not fizzled out - and Winn is back in Sutherland's arms, reports Star magazine.

A source says, "She really understands him and his quirks, and once the pressure was off to fix the marriage, he relaxed and became more open with her. He's finally realised he never should have left Kelly."

Sutherland, 42, was last romantically linked to magazine editor Siobhan Bonnouvrier, but they allegedly called off their relationship over the summer.

Winn was the actor's second wife - he was previously married to Camelia Kath.