Harry and the Hendersons (1987)

John Lithgow, Lainie Kazan, David Suchet, M. Emmet Walsh

Returning from a hunting trip in the forest, the Henderson family's car hits an animal in the road. At first they fear it was a man, but when they examine the "body" they find it's a "bigfoot". They think it's dead so they decide to take it home (there could be some money in this..). As you guessed,