Liza Minnelli and David Gest, who were married last year in a star-studded ceremony, have separated, Minnelli's spokesman said Friday.
Spokesman Warren Cowan said he could provide no other details.
Minnelli and Gest wed in March 2002 with best man Michael Jackson briefly carrying the bride's train. Elizabeth Taylor served as maid of honor.
Hundreds of fans lined Fifth Avenue to watch guests including actors Michael Douglas, Anthony Hopkins and David Hasselhoff, rocker Elton John, TV newswoman Barbara Walters and KISS band member Gene Simmons arrive.
Gossip columnist Liz Smith called the nuptials, Minnelli's fourth, "the kissiest wedding" she's ever seen.
Minnelli danced in happiness at the altar after tying the knot, attendees said.
Minnelli and Gest earlier in the day canceled an appearance Tuesday on CNN's "Larry King Live," a spokeswoman for King said Friday.
The bride and groom were introduced by Jackson when Minnelli appeared on a Gest television production entitled "Michael Jackson: 30th Anniversary Special."
Minnelli, daughter of Judy Garland and director Vincente Minnelli, has won an Academy Award, an Emmy, two Golden Globes and three Tony Awards.
But she has also battled substance abuse, weight gain and a near-fatal bout with encephalitis. Earlier this year, the performer underwent surgery after breaking her kneecap in a fall at a hotel in Italy.