. Brooke Shields prepares to board the private jet in Burbank With Tom Cruise and Katie Holmes's nuptials merely days away, some of their high-profile pals hopped a plane to Italy on Wednesday, PEOPLE has learned. Expected wedding guests, including Brooke Shields, Jada Pinkett Smith, and Jennifer Lopez and Marc Anthony, boarded a private jet Wednesday at Burbank Airport. Meanwhile, Cruise, 44, and Holmes, 27, were at City Hall in Rome on Wednesday. The couple first arrived in Italy, along with an entourage of 10 people, via private jet on Monday. Other expected wedding attendees, Victoria and David Beckham, have a shorter distance to travel for the wedding but are struggling with what gift to get for the bride and groom. "David and Victoria are still scratching their heads as to what is the perfect present to give them," says a source close to the couple. "It's pretty damn hard finding the ideal gift for Tom and Katie." The happy couple are scheduled to tie the knot in black-tie ceremony at the medieval, fortress-like Odescalchi Castle on Lake Bracciano, 18 miles northwest of Rome, on Saturday. Tom Cruise may have famously jumperd on Oprah's couch declare his love for Katie Holmes, but Winfrey won't be at his wedding in Italy Saturday. "It's not that I'm not going," Winfrey tells Extra's AJ Calloway in a segment to air on Tuesday. "It's that they had a limited number of people that they could invite. I was not one of the invitees. That's fine. I don't get invited to everyone's wedding. I don't invite them to everything I do. But I wish them the best."