Quite simply one of the most unique comedy movies ever made. Penned by Andrew Bergman in the wake of the success of Blazing Saddles (for which he was the original scriptwriter), and directed by noted comedy filmmaker Arthur Hiller, the In-Laws was born out of a request from Warner Bros. for a sequel to Richard Rush's slapstick buddy cop comedy progenitor Freebie and the Bean.
The end result was entirely unrelated, but saw Alan Arkin return, this time as hapless dentist and father of the bride Sheldon Kornpett, opposite CIA agent and father to the groom, Peter Falk as Vince Ricardo. Just days out from the impending marriage of their children, Vince's daring black op mission goes awry, wrangling Sheldon into a nonstop string of espionage, assassination attempts and slapstick gags.
The most wonderful thing about the In-Laws is the way in which it slowly builds its comedy in layers. What starts out as a merely awkward 'cringe comedy' prototype slowly morphs into an all-out live action 'Looney Tunes' event. A perfect script, a perfect cast, a perfect comedy film.