She is best known as the writer of the films The Wedding Date (2005), What Happens in Vegas (2008) and Wicked (2024, co-written with Winnie Holzman), and the television comedy series Ben and Kate (2012–13).
[1] 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.
[3] While represented by Gough and Millar's agent, established screenwriter Jessica Bendinger sought after an unpublished writer who would work inexpensively on a screenplay.
[1] 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.
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".