Their guests of honor? American and British troops.
"We wanted them to know how we are behind them...how we care," producer Jerry Weintraub, who arranged the visit with the help of former President George Bush, told ABCNews.com on Thursday.
"We're going to give them a hug from everybody in America because they're out on the front lines fighting this war for us...and we want them to know how we're behind them and how we care," Weintraub told ABCNews.com.
The stars of the movie also talked with Barbara Walters about how the events of Sept. 11 changed their lives.
"I was in New York when it happened," Matt Damon said. " It certainly affects everything, affects my thinking more than my actions probably. Everybody that I knew survived it. They got out."
"This catastrophic event is really--certainly for me, and I feel like our culture--made us appreciate again what we have. It's basically reminded us of these freedoms," said Brad Pitt. "I want to see those buildings rebuilt. It's important to America to get our symbol back."
The Ocean's Eleven entourage will send copies the film to 11 U.S. warships during their stay in Turkey. From there, the stars will travel to London and Paris for media interviews.
Ocean's Eleven hits U.S. theaters on Dec. 7.