Tom Cruise and Katie Holmes are now husband and wife. The couple exchanged vows Saturday in front of more than 150 guests at the Odescalchi Castle in Lake Bracciano, Italy, their rep, Arnold Robinson, confirms to PEOPLE.


With thousands of fans, photographers and TV cameras watching from afar, Cruise and Holmes were joined by family – Katie's dad Martin walked her down the aisle – and some of their celeb pals, including Will and Jada Pinkett Smith, Brooke Shields and Chris Henchy, Victoria Beckham, Jennifer Lopez and Marc Anthony, and Jim Carrey and Jenny McCarthy, among others.


The sunset ceremony was performed by a Scientology minister, according to a statement from their reps. The wedding party included Cruise's children, Isabella and Connor, the best man was Cruise's best friend, David Miscavige – the head of the Church of Scientology – and Katie's sister Nancy Blaylock served as the matron of honor.


Though initially there were questions about whether Cruise and Holmes's marriage on Saturday was official – the Mayor of Bracciano, Italy, said the couple needed to have a civil ceremony in town in order to make it legal – Cruise's reps say Tom and Katie took care of everything beforehand.


"As is customary for couples marrying outside of the United States, Cruise and Holmes officialized their marriage in Los Angeles prior to their departure for Italy," according to the statement.


Holmes wore an off-the-shoulder Armani gown with an ivory silk train adorned in Valenciennes lace and Swarovski beaded crystal embroidery. She accessorized her gown with an ivory tulle floor-length veil and ivory silk shoes. Armani, which outfitted the entire wedding, also supplied Katie's bouquet of calla lilies, as well as a champagne evening gown, which she wore at the reception.


Armani outfitted Cruise with a navy blue tuxedo from the Giorgio Armani Hand Made to Measure collection. The jacket label read, "Giorgio Armani for Tom Cruise." Their rings were white gold Cartier with diamonds.