Trivia: Some weapons used by 300 are actually weapons from previous war epics like "Alexander" and "Troy." They were used in this film to cut costs.
Trivia: Families of the 40 passengers and crew members killed on United Flight 93 cooperated in the production, offering Greengrass detailed background about their loved ones, down to the clothes they wore, what reading materials or music they had with them and what sort of candy they might have snacked on aboard the plane.
Trivia: This film was filmed back-to-back with Flags of Our Fathers, a movie from the American perspective of the battle of Iwo Jima.
Trivia: This movie was filmed back-to-back with Letters from Iwo Jima, a fictional account of the battle of Iwo Jima that looks at it from the Japanese soldier's perspective.
Trivia: Outside the Port Authority terminal is a statue of Jackie Gleason as Ralph Kramden from "The Honeymooners." According to Oliver Stone in the audio commentary, that statue actually exists.
Trivia: Although Adrian Brody was officially the star of "Hollywoodland," his character (private detective Louis Simo) was a completely fictional role in the movie. Virtually all of the other characters in the film are based on real people, but there never was a Louis Simo, and he's not based on any actual person (s). George Reeves' mother did hire an attorney and a detective agency in real life; however, "Hollywoodland" director Allen Coulter said that the character of Louis Simo wasn't even partially based on anyone in real life.