The couple of three years celebrated their Friday-night nuptials with a reception for just 50 guests at a private Manhattan residence on 49th Street, the New York Post's gossip column adds, where cocktails were served in a rear garden ahead of an indoor dinner.
While details on what the bride wore have yet to be revealed, one fascinating detail has emerged: Page Six quotes a source who says that tables at the wedding reception featured "bowls and bowls filled with cigarettes, and everyone smoked the whole night."
News that the former "Full House" star and twin of Ashley Olsen was engaged to Olivier, who's the brother of former French President Nicolas Sarkozy, emerged in February 2014.
He has two teenage children from a previous marriage.
"Everyone has an opinion," Mary-Kate has said of their relationship. "I find it's better to focus on what's in front of you and to keep putting one foot in front of the other."