Drew Barrymore bought the screen rights to Charlie's Angels (1976) prior to the movie being filmed - a decision that earned her an estimated $40 million for the first film and a possible $80 million for the second.
Drew Barrymore was a huge "Harry Potter" fan, even going so far as to read bits of the books to the cast and crew during production. At the beginning of the film, during the clips of previous jobs, she can be seen wearing a Harry Potter disguise, complete with robes, black hair and round black glasses.
After Cameron Diaz's character wakes up from her ballroom dance dream and dances around in her bedroom, she was asked to dance worse with each take. She found this somewhat difficult given her extensive ballroom dance training.
The Thin Man, played by Crispin Glover, originally had a speaking role, but Glover didn't like the lines, so he asked for them to be removed. The director and producer agreed to make it a non-speaking role to give the character a more mysterious feel.
After Dylan (Drew Barrymore) tumbles down a hill, she arrives practically naked at a house with two boys playing a video game. This is actually the same house used from the classic film E.T. the Extra-Terrestrial (1982) in which Drew starred. You can even see a bowl of Reese's Pieces (ET's favorite candy) and a movie poster of "ET".
At the Japanese themed party, when Natalie first meets Pete, he greets her with "konichiwa", Japanese for "Hello", and she responds "Nihongo no shaberu no sugoi ne!" which means "You speak Japanese very well!"
The secret language the Angels use is Finnish, though very poorly pronounced. They said in Finnish: Alex: "Onko sinun ja Knoxin välillä menossa jotain?" Dylan: "Ei tietenkään." Natalie: "On vain niin, että suhteet asiakkaiden kanssa ovat tosi huonoja ideoita." Dylan: "Olen samaa mieltä." Translated roughly in English: Alex: "Is there something going on between you and Knox?" Dylan: "Of course not." Natalie: "It's just that relationships with customers are very bad ideas." Dylan: "I agree." Drew Barrymore's pronunciation was the best.
The speaker sitting on Bosley's desk, through which the Angels hear Charlie's assignments, is almost the same as the one used in the TV series (Charlie's Angels (1976)). The speaker in the original series had a small "Bell" in the lower corner, the movie version did not.
The hillside house is modeled after a real California architectural landmark, the Chemosphere House created by architect John Lautner. The entire house was created on a soundstage and was actually much larger and rounder than the original.
An in-joke in the opening scene has a character react to the in flight film "T.J. Hooker - The Movie" with "Oh no, not another movie based on an old TV show!". On Monday, July 6th, 2009 it was announced that T.J. Hooker: The Movie, was based on T.J. Hooker (1982) & in development.
When Natalie is in the Red Star mainframe, she lifts up a computer board where she installs the antenna. The computer board is the motherboard of an Apple PowerMac G3. You can see the FireWire and USB ports and the wave-design back panel.
The bird Natalie refers to as a pygmy nuthatch is in fact a Venezuelan troupial. While the nuthatch is found in the Carmel, California area it has a much wider range than just Carmel, and the Venezuelan troupial would only be found in Venezuela and select Caribbean islands.
The film's martial arts choreographer and trainer appears as a fellow passenger on the plane in first class at the start of the film. He can be seen speaking in Cantonese to two pretty women, teaching them to say "thank you".