The In-Laws (1979)

Director: Arthur Hiller
Cast: Alan Arkin, Arlene Golonka, Michael Lembeck, Nancy Dussault, Paul L. Smith, Penny Peyser, Peter Falk, Richard Libertini

Synopsis:

In preparation for his daughter’s wedding, dentist Sheldon Kornpett meets Vince Ricardo, the groom’s father. Vince, a manic fellow who claims to be a government agent, then proceeds to drag Sheldon into a series of chases and misadventures from New York to Central America.