Kelly Marcel (born 10 January 1974) is an English screenwriter, film director, and former actress.
After working as a child actor in the United Kingdom, Marcel had her breakout as a screenwriter in Hollywood when her script for Saving Mr. Banks made the 2011 Black List and was quickly acquired by Disney, which released the film in 2013. She is also known for writing Fifty Shades of Grey (2015), the Sony's Spider-Man Universe films Venom (2018), its sequels Venom: Let There Be Carnage (2021) and Venom: The Last Dance (2024), the latter of which she made her directorial debut.