The famous scene where Edward snaps the necklace case down on Vivian's fingers was improvised by Richard Gere, eliciting a very real and very iconic laugh from Julia Roberts.
Red Hair In The Bubble Bath
The famous scene featuring Vivian in the bubble bath used a detergent so strong that it rinsed off Julia Roberts' red hair dye, forcing her to re-dye later that night.
An Alternate Sandra Bullock Universe
Despite becoming instantly iconic in the role, Julia Roberts was not the first choice to play Vivian.
Sandra Bullock was reportedly offer the part, but turned it down. As did Meg Ryan, Molly Ringwald, Kristen Davis and Sarah Jessica Parker.
Richard Gere himself composed the music he famously plays on the piano during the movie.
Richard Gere is 18 years older than Julia Roberts in real life. When the film was shot, Gere was 40-years-old, while Roberts was only 22.
Harrison As Edward
Before Richard Gere was cast, the studio had considered Harrison Ford for the role of Edward.
Also reportedly considered for the part were Bruce Campbell, Danny Glover, Christopher Lambert and John Heard.
Director Garry Marshall has a secret cameo in the film, doing the voice-over of the man digging through the trash outside Sylvester Stallone's home.
It Used To Be Darker
In the original, dark and more dramatic script for the film, Julia Roberts' character Vivian, as well as being a prostitute, was supposed to be a cocaine addict, promising to go clean for a week. A scene later in the film would have had her friend Kit overdose on drugs.
Richard Gere very nearly turned down the role of Edward, but he changed his mind after Julia Roberts passed him a Post-it note with the words "please say yes."
Hector Elizondo Was Marshall's Man
Actor Hector Elizondo, who played Barney in the film, had a long collaboration with director Garry Marshall.
Elizondo starred in all 18 of Marshall's feature films, starting with 1982's "Young Doctors in Love". Three of those films also starred Julia Roberts, including 199's "Runaway Bride" and 2010's "Valentine's Day".