Marc Jacobs Sets a Wedding Date, Reveals More Costume Institute Gala Guests April 30, 2009 9:40 am >> As Marc Jacobs gears up for sponsor duties on Monday's Costume Institute Gala, he's got another big event on his mind: his wedding. He got engaged to fiance Lorenzo Martone last month, and the two are already planning what is sure to be a big bash in Provincetown, Massachusetts, according to Martone — one of their favorite vacation spots. "Yes, [the wedding is happening] in the summer — in June, even before summer! And then [we'll have] a party in December in St. Barths."Just last week, Lorenzo revealed that he was the one who proposed, and he bought their pink-gold triple band rings at Boucheron, Marc's favorite jeweler, in Paris during Fashion Week.