You've Got to Walk It Like You Talk It or You'll Lose That Beat (1971)

You've Got to Walk It Like You Talk It or You'll Lose That Beat is a 1971 comedy-drama film directed by Peter Locke. It involves a young hippie and his search for the meaning of life while in Central Park. Its soundtrack is notable as being some of the earliest released music by Donald Fagen and Walter Becker, the duo who later formed the core of the group Steely Dan. The film also stars Richard Pryor in an early role playing his signature "wino" character, and actor/director Robert Downey Sr., father of Robert Downey Jr.

More at Wikipedia.