Heather Locklear has called off her engagement.

The 50-year-old actress - who was previously married to Motley Crue drummer Tommy Lee and Bon Jovi rocker Richie Sambora - announced she was to marry her 'Melrose Place' co-star Jack Wagner three months ago, but the pair have now backtracked on their plans.

A spokesperson for Heather told Usmagazine.com: "Jack and Heather are no longer engaged."

It is not clear why Jack and Heather - who began dating in 2007 - have ended their engagement.

Speculation their relationship was in trouble was rife last night (14.11.11) when the actress arrived alone at the 'Twilight Saga: Breaking Dawn Part I' premiere and was not wearing her engagement ring.

Jack is best known for playing a sea captain on long-running US TV show 'The Bold and the Beautiful', while Heather is currently working on 'The Assistants' alongside David Henrie.

The blonde beauty has had a turbulent few years - last year she was arrested, and later cleared for, a hit-and-run accident after hitting a No Parking sign in Ventura County, California, and in 2008 she entered rehab seeking treatment for anxiety and depression.