Marc Jacobs President Robert Duffy married boyfriend Alex Cespedes on in Provincetown on Tuesday, with Jacobs on hand as the best man, The Boston Herald reports .

Also on hand to hear the "I Dos" were, "tons of models," according to a source. "It was a bunch of tall girls and short guys--all beautiful."

And a few naked guys:

"It was a Full Monty--all the way down," said Someone Who Was There. "They were both really, really handsome. The grooms and the young people at the wedding seemed to enjoy it. The older people, I don't know..."

No one's quite sure if the babes in the buff were hired or just a couple of carried-away party guests. But Duffy seems to like his parties with a side of skin, once posting naked party pics on Twitter. Congrats to the happy couple!