Kelly Marcel (born 10 January 1974) is a British screenwriter. She wrote the films Saving Mr. Banks (2013), Fifty Shades of Grey (2015), Venom (2018), its sequels Let There Be Carnage (2021) and the upcoming The Last Dance (2024). She will make her directorial debut with the latter film. She also created and served as executive producer of the television series Terra Nova (2011). ()