Trivia: Scenes for the film were filmed during the Wimbledon tournament 2003. The actors would walk out on court at the beginning or end of a match as though they were really competing. The officials and spectators were actual tennis officials and spectators, rather than extras. It is the only time in the history of the tournament that this has been allowed.
Trivia: Anne Hathaway sang her own songs in the film.
Trivia: When Miles is stealing money from his mother he looks at the pictures on her dresser. One of the pictures is of Miles and his Dad. It is actually Miles real dad. Miles is played by Paul Giamatti and his dad is Bart Giamatti former Commissioner of Baseball. That is who is in the picture smiling with Miles.
Trivia: Breckin Meyer, who plays Jon, is allergic to cats in real life.
Trivia: When Pete is watching the war movie on the television, you can hear the Wilhelm scream.
Trivia: Natalie Portman considers this movie to be her first one that helped her get away from her "Star Wars image".
Trivia: In the original script the movie was supposed to be set in New York City, but after the September 11 attacks the location was moved to Baltimore.
Trivia: Director Peter Howitt has a cameo at the start of the film - he's the husband (Pierce Brosnan's client) in the divorce case.
Trivia: Michael Caine, who plays Henry Lair, is only 10 years older than his on-screen son Christopher Walken (Turner Lair).
Trivia: When Crichton talks to "Harvey" (Scorpius in his head) for the first time in the movie, Scorpius is dressed like Einstein. There is a blackboard with equations on it. One of them is "e = MC hammer". (00:21:30)
Trivia: Even though Angelina Jolie plays Colin Farrell's mother in the movie, she is only a year older than Farrell.
Trivia: Although they play father and daughter in this film, John Turturro (born 1957) is only seven years older than Monica Bellucci (born 1964).
Trivia: Monroe Cole states that people will be calling him Mr. President for the rest of his life. While it is true people do tend to call former presidents by that title (thus not a movie mistake), as a point of trivia; is it incorrect to address a former president as "Mr. President" or "former president (surname)." While Cole doesn't have to worry about his ex-wife taking his title, leaving office will do that. It's the media that perpetuates this presidential title error.
Trivia: In the English dub of the film, Anna Paquin voices Ray Steam, Alfred Molina voices Edward (Ray's father) and Patrick Stewart voices Lloyd (Ray's grandfather). The three also share another connection in real-life. Paquin and Stewart co-starred in all three "X-Men" films, which were created by Marvel, and Molina starred in another popular Marvel comic-turned-film, when he appeared as the villain in "Spider-Man 2."