Catherine Léger (born 1980) is a Canadian playwright and screenwriter from Quebec. A graduate of the National Theatre School of Canada, she won the Prix Gratien-Gélinas in 2006 for her theatrical play Voiture américaine. Her subsequent plays have included Opium_37 (2010), Princesses (2011), J'ai perdu mon mari (2015), Filles en liberté (2017) and Baby-sitter (2017). She wrote the screenplay for Babysitter, Monia Chokri's 2022 film adaptation of Léger's theatrical play of the same name.