Splitsville for Julia and Ben

June 28 -- It's over, spokesmen for Julia Roberts and Benjamin Bratt say.

Another one of Hollywood's most celebrated relationships has crashed and burned after three and a half years. Both sides say the split was mutual. But Roberts' friendship with her Ocean's 11 co-star George Clooney reportedly pulled the relationship apart.

In Las Vegas, where the remake of the Frank Sinatra/Dean Martin movie is being filmed, the Las Vegas Review-Journal is reporting that Roberts and Clooney, "put on a steamy show on the dance floor," during the wrap party.

The relationship between Bratt and Roberts appeared to be on good terms in early March, when the American Museum of the Moving Image saluted Roberts with a gala dinner at New York's Waldorf Astoria. Roberts gushed over Bratt. "He's the best reason to go home that I can think of and the nice thing about a night like this is that it means I get to take a really, um, long extended vacation," she said, singling him out in the crowd.

"So, you plan that honey and I'll be there."

Roberts has been known to have relationships with her leading men. In 1988, she moved in with her Satisfaction co-star Liam Neeson. Two years later, she dropped him for Dylan McDermott of Steel Magnolias. The two were engaged for a while, but she went on to strike up a relationship with her Flatliners co-star, Kiefer Sutherland.

Roberts then got involved with Jason Patric. In 1993, she finally made it to the altar with singer Lyle Lovett. They divorced after a year. She was then involved with In the Name of the Father star Daniel Day-Lewis.

Buck Wolf and ABCNEWS Radio contributed to this report.