Kutcher, 27, and Moore, 42, were married at a private home Saturday night, Us Weekly and People reported on their Web sites.
Kutcher's publicist, Matt Labov (search), told The Associated Press on Sunday afternoon that he had no comment on the reports and referred all questions to Moore's representative, Stephen Huvane (search), who did not return telephone messages.
According to the magazines, the wedding guests included Moore's ex-husband, Bruce Willis (search), and their three daughters, Rumer, 17, Scout, 14, and Tallulah, 11; actors Wilmer Valderrama, Lucy Liu and Soleil Moon Frye; and Frye's husband, Jason Goldberg, who co-produced the MTV television show "Punk'd" with Kutcher.
The reported marriage was the first for Kutcher, whose credits include the TV series "That '70s Show" and films "Cheaper by the Dozen" and "Guess Who?", and the third for Moore, who has starred in three dozen films during her 24-year career including "St. Elmo's Fire", "Ghost" and "G.I. Jane."
Moore's two previous marriages — to rocker Freddie Moore (1980-84) and Willis (1987-2000) — ended in divorce.
Moore and Kutcher met in 2003.
In an interview in the September issue of Harper's Bazaar, Moore described Kutcher as her "soul mate" and said they wanted to expand their family. But she said they had no marriage plans.
People Magazine said Kutcher and Moore met at a dinner in New York City in 2003. After Kutcher began dating Moore, the magazine said "he quickly carved out a place in the lives of her three daughters by Willis who came to embrace Kutcher as a third parent, affectionately calling him MOD, short for 'My Other Dad."'
The relationship between Moore and Kutcher has been seen by some in Hollywood as evidence of a liberating new trend in which older American women are dating younger men, challenging the traditional convention of May-December romances.