John Beckwith (Owen Wilson) and Jeremy Klein (Vince Vaughn) are a pair of divorce mediators who spend their weekends crashing weddings in search of Ms. Right... for a night. But when one of them falls for the engaged daughter (Rachel McAdams) of an influential and eccentric politician (Christopher Walken) at the social event of the year, they get roped into spending a wild weekend at the family's palatial waterfront estate and quickly finding themselves in over their heads.   Canadian Connection: Actor Rachel McAdams was born and raised in Ontario.