Answer
How to Steal a Million is a 1966 American comedy-thriller film directed by William Wyler, and starring Audrey Hepburn and Peter O'Toole. The screenplay by William Peter Blatty was based on a story by George Axelrod. The film is about a Parisian art dealer (Hepburn) who has to protect a valuable painting from her ex-lover, a wealthy art thief (O'Toole).