Demi Moore announced Thursday that she is filing for divorce from Ashton Kutcher after six years of marriage.

"It is with great sadness and a heavy heart that I have decided to end my six-year marriage to Ashton. 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," she told the Associated Press. "This is a trying time for me and my family, and so I would ask for the same compassion and privacy that you would give to anyone going through a similar situation."

Rumors began circulating about the couple's marital troubles in September, when Kutcher was reportedly caught cheating. Though he denied the allegation, reports continued to surface that the pair were working on their marriage in light of the infidelity.

People have long questioned the couple's age difference; the pair married in 2005, when she was 43 years old and he was 27. In 2007, Moore told Vanity Fair that their relationship "caught us both by surprise." Could their age disparity have contributed to their marriage's demise?

Here, a look back at their 5-year marriage.

"Charlie's Angels 2: Full Throttle" Premiere, 2003
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HOLLYWOOD, CA - JUNE 18: Actress Demi Moore with actor Ashton Kutcher attends the premiere of Columbia Pictures' film 'Charlie's Angels 2: Full Throttle' at the Grauman's Chinese Theatre June 18, 2003 in Hollywood, California.