Lock Up is a 1989 American prison action film directed by John Flynn. It stars Sylvester Stallone, Donald Sutherland, Tom Sizemore, and John Amos. It was released in the United States on August 4, 1989.Stallone later said it was "Not a film that was produced and performed with enough maturity to really make a significant impact on the audience or my career. And that’s the truth.”