Trivia: Richard Gere actually plays the piano - and he composed this piece himself.
Trivia: The scene where Edward offers Viv the necklace and shuts the box on her fingers wasn't scripted - Richard Gere did it as a joke. You can tell because when he does it, Julia Roberts laughs and looks up and around (ie. at the film crew) - in the context of the scene there wasn't anyone there for her to look at. (01:21:45)
Trivia: Per Gessle (of the rock group Roxette) has said in interviews that he was asked to write a song for the film. However he didn't have the time so he gave the filmmakers an already recorded song, "It Must Have Been Love."
Trivia: On the movie poster, Edward's hair is brown. In the movie it's gray.
Trivia: At the beginning of the movie when Edward is driving around trying to find Beverly Hills, the bum he asked for directions from is actually the director of the movie, Garry Marshall.
Trivia: Julia Roberts has often said that "It Must Have Been Love", which plays when Vivian is leaving Edward and going back to her apartment, is one of her favorite songs.
Chosen answer: Posters are usually designed long after the film has been made, and by the marketing department. Decisions about the outfit may have been based solely on what was considered best by the marketing department (for instance, to match the color of the lettering in the title.) Also, Julia Roberts' head has been super-imposed onto a model's body in the poster image (just as Richard Gere's hair has been darkened). These are all creative marketing decisions.