Impostor is a 2001 American science fiction psychological thriller film based upon the 1953 short story "Impostor" by Philip K. Dick. The film starred Gary Sinise, Madeleine Stowe, Vincent D'Onofrio, and Mekhi Phifer and was directed by Gary Fleder.

Gary Alan Sinise is an American actor of stage and screen, as well as a director, producer, musician, and humanitarian. Among other awards, he has won a Primetime Emmy Award, a Golden Globe Award, a Tony Award, and four Screen Actors Guild Awards. He has also received a star on the Hollywood Walk of Fame, and he has been nominated for an Academy Award. Sinise has also received numerous awards and honors for his extensive humanitarian work and involvement with charitable organizations. He is a supporter of various veterans' organizations and founded the Lt. Dan Band, which plays at military bases around the world.