On the basis of a new thread about the Clampetts:
Beverly Hillbillies' Cop - Axel Foley returns to Beverly Hills, only this time, it is for the family reunion of his new fiance, who turns out to be from a surprisingly wealthy family, and not a small town deep south family, like he'd thought... Or maybe he was right the first time after all!
(Naturally, Axel soon finds out that he's actually a long lost, but not so distant, cousin of the family. But then again, he also realises that the rest of them don't think that's problematic, so... neither does he!)