ashton-demi-split-new-230.jpgDemi Moore has decided to end her marriage to husband Ashton Kutcher.

The 49-year-old actress tells the Associated Press that she came to this decision with "great sadness and a heavy heart."

Moore, who has appeared extremely thin in recent weeks, added, "as a woman, a mother and a wife, there are certain values and vows that I hold sacred, and it is in this spirit that I have chosen to move forward with my life."

Moore and Kutcher, 33, tied the knot in September 2005.

Their marriage has been on shaky ground since reports surfaced months ago that 22-year-old Sara Leal had an affair with the actor.