Fox graduated from Stanford University in 1998 with a degree in English and art history, and went on to attend the University of Southern California (USC), where she took part in the USC School of Cinematic Arts' Peter Stark Producing Program and graduated in 2000. She had originally intended to become a film Producer, but when assigned a homework task at USC to write a 30-page screenplay, she found that she enjoyed writing more and decided to become a Screenwriter instead. She became an assistant to Writers Alfred Gough and Miles Millar while they were creating the Superman television series Smallville, and later worked for writer-director John August.
While represented by Gough and Millar's agent, established Screenwriter Jessica Bendinger sought after an unpublished Writer who would work inexpensively on a screenplay. Fox had not yet written a sample screenplay, but Bendinger was so impressed with her ideas for the story that Fox was hired to write the script. The produced film was The Wedding Date, which ultimately was panned by critics but a financial success. After The Wedding Date's release, she was attached to three separate writing projects. Her next produced screenplay was What Happens in Vegas, which was bought by 20th Century Fox in a high six-figure deal for the script's first draft, and which stars Cameron Diaz and Ashton Kutcher. After What Happens in Vegas was bought, Fox performed rewrites on 27 Dresses (2008) and Knight and Day (2010), and was named one of Variety magazine's "10 Screenwriters to Watch" of 2007.
Fox currently lives in Los Angeles, California, where she works with fellow writers—who call themselves best friends—Diablo Cody (Juno) and Lorene Scafaria (Nick and Norah's Infinite Playlist) in a writing group they jokingly call "The Fempire". Fox married Quinn Emmett on October 23, 2010 at Historic Jamestowne in Williamsburg, Virginia.
Fox is good friends with fellow Writers Diablo Cody (Juno), Lorene Scafaria (Nick and Nora's Infinite Playlist), and Liz Meriwether (No Strings Attached) with whom she collaborates in a writing group they call the "Fempire". In 2012, Fox and the "Fempire" received the Athena Film Festival Award for Creativity and Sisterhood.
