William Francis Sutton Jr. was an American bank robber. During his forty-year robbery career he stole an estimated $2 million, and he eventually spent more than half of his adult life in prison and escaped three times. For his talent at executing robberies in disguises, he gained two nicknames, "Willie the Actor" and "Slick Willie". Sutton is also known as the namesake of the so-called Sutton's law, although he denied originating it.

Bank robbery is the criminal act of stealing from a bank, specifically while bank employees and customers are subjected to force, violence, or a threat of violence. This refers to robbery of a bank branch or teller, as opposed to other bank-owned property, such as a train, armored car, or (historically) stagecoach. It is a federal crime in the United States.