The six-year marriage of Hollywood stars Ashton Kutcher and Demi Moore may be coming to an end and the couple's silence on the matter over the past few months has added to the rumors.

Their once active Twitter accounts, which used to be full of notes about their happily-married life, have been quiet for some time.

The rumor is that Kutcher's affair with Sara Leal, a woman he met Saturday at the Hard Rock Hotel in San Diego, could be the cause of the split.

The couple was married in 2005, in Beverly Hills, after a two-year romance.

See the photos below for a reminder of their happier moments.