ABC News September 26, 2014

Matt Damon, Cindy Crawford Among the Stars Attending George Clooney and Amal Alamuddin's Wedding

Andrew Medichini/AP Photo
George Clooney, left, Cindy Crawford and her husband Rande Gerber walk in the garden of the Cipriani hotel in Venice, Sept. 27, 2014.

George Clooney and Amal Alamuddin are celebrating their upcoming nuptials in Italy and they have a who's who of Hollywood A-listers to help them.

Upon arriving in Venice earlier this morning, they were photographed on a boat with their two close friends, Cindy Crawford and her husband Rande Gerber, who's said to be Clooney's best man.

Also seen in Venice: Matt Damon with his wife, Luciana Barroso, guitarist Steve Lukather, actress Ellen Barkin, and Vogue editor-in-chief Anna Wintour. Brad Pitt and Angelina Jolie are also reportedly set to attend, as are Bono and Sandra Bullock.

All the Details of George Clooney and Amal Alamuddin's Wedding Weekend

On Saturday evening, the guests will be escorted by police boats from the Cipriani hotel, where many of them are staying, to the Aman hotel for a pre-wedding party. The groom-to-be, 53, can't wait to say "I do" it seems.

"I would just like to say to my bride-to-be, Amal, that I love you very much," he said at a charity event earlier this month. "And I can't wait to be your husband."

Pierre Teyssot/AFP/Getty Images
Editor-in-chief of American Vogue Anna Wintour arrives at Marco Polo Airport in Venice, Italy, Sept. 26, 2014.
Pierre Teyssot/AFP/Getty Images
Guitarist Steve Lukather arrives at Marco Polo Airport in Venice, Italy, Sept. 26, 2014.
Luigi Costantini/AP Photo
Matt Damon, right, flanked at left by his wife Luciana Barroso, arrive in Venice, Italy, Sept. 26, 2014.