Man of a Thousand Faces is a 1957 American dark dramatic film detailing the life of silent film actor Lon Chaney, played by James Cagney.

Leonidas Frank "Lon" Chaney was an American actor and makeup artist. He is regarded as one of the most versatile and powerful actors of cinema, renowned for his characterizations of tortured, often grotesque and afflicted, characters and for his groundbreaking artistry with makeup. Chaney was known for his starring roles in such silent horror films as The Hunchback of Notre Dame (1923) and The Phantom of the Opera (1925). His ability to transform himself using makeup techniques that he developed earned him the nickname "The Man of a Thousand Faces".