O Lucky Man! is a 1973 British comedy-drama fantasy film directed by Lindsay Anderson and starring Malcolm McDowell as Mick Travis, whom McDowell had first played as a disaffected public schoolboy in his first film performance in Anderson's if.... (1968). O Lucky Man! is the second film in the Mick Travis trilogy, all starring McDowell as an everyman character, concluding with Britannia Hospital (1982).

Some critics consider this film one of the best British films ever.