Shooting the film lasted only 64 days. However, post-production, due to the heavy special effects, required 68 weeks.
Jon Favreau shot the film in California because he felt that too many superhero films were set on the East Coast, especially New York City.
The lead character says the word 'man' 147 times in the movie, nearly 1.5 times a minute.
Robert De Niro
In preparation for his role, De Niro entered into three genuine Brooklyn boxing matches and won two of them.
The scene involving the shootout after the bank robbery was particularly tricky to film since they were only allowed to film on the weekends.
At one time Jim Carrey was slated to star as the lead and even contributed jokes to the screenplay, such as the main character being named 'Focker'.
Most of the bruising seen on Rooney Mara's body when she takes a shower is in fact real, the physicality of shooting the rape scene the day before resulted in countless bruises on the actress' wrists, neck and torso.
The name of the lead character is never revealed, he is simply referred to as XXXX in the movies credits
It is the highest-grossing film ever in the UK, surpassing the £94.03 million of Avatar.
The narrators breath in the cave scene is recycled Leonardo DiCaprio breath from Titanic, which was composited into the shot.
Brad Pitt gave up one of the starring roles in The Departed in order to participate in this film, as he's a longtime fan of Alejandro González Iñárritu's films.
When the movie was released in Italy, the title was not translated because its Italian/Latin equivalent,'Troia', is Italian slang for 'prostitute.'
The single biggest cost on the film was purchasing the rights to the various songs played throughout the movie by the lead character
Bales 63-pound weight loss is said to be a record for any actor for a movie role.
During filming, Bale became angry at director of photography Shane Hurlbut; swearing, ranting and threatening him. The subsequent audio of the event became an internet sensation.
Although they play father and son in the film, in reality, Sean Connery is only 12 years older than Harrison Ford.
The first film to make over $300,000,000.
Harrison Ford became a spokesman for Japanese electronics throughout the 1980s following his role in this film.
The hand and stomach on the film's poster do not belong to Mena Suvari, but are in fact those of actress/model Chloe Hunter.
The line-up scene was scripted as a serious scene, but after a full day of filming takes where the actors couldn't keep a straight face, director Bryan Singer decided to use the funniest takes.
The Movie was originally developed by HBO as a weekly police/crime series. A pilot that starred Kiefer Sutherland was produced, but the series was not picked up afterwards.
The most-voted-for film on IMDb that is not on the Top 250 List.
Ewan McGregor was Danny Boyle's first choice to play the part of Richard. The studio wanted Leonardo DiCaprio and cast him before Boyle could intervene. While McGregor blames the studio, he has reportedly not spoken to Boyle since.
The real Frank W. Abagnale Jr arrests Leonardo DiCaprio in France, he is the man in the coat and hat who pins Leonardo against the police car.
Al Pacino originally grew a mustache as a way to help him deal with the fact that he was playing a gay man. However, when looking at the first day's rushes, he quickly realized that the mustache had to go.
Marlon Brando did not memorize the majority of his lines and read from cue cards during most of the film.
Tony's 'little friend' is an M16 assault rifle with an M203 40mm grenade launcher attached to the barrel.