Actor Kiefer Sutherland has dismissed reports he's reunited with his ex-wife Kelly Winn.

The 24 star was alleged to have rekindled his relationship with the former model in recent months, a year after their divorce was finalized.

The couple split in 1999 but Sutherland only filed separation papers in 2004 and their marriage was legally declared over in May 2008.

America's Star magazine claimed the former husband and wife were back together after rekindling their love over the summer.

A source told the tabloid, "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."

But Sutherland's representative is adamant there was no reunion, telling GossipCop.com the reports are "not true".

Winn was Sutherland's second wife. He was previously married to Camelia Kath.