Christy Marx (born c. 1952) is an American screenwriter, author, and game designer, best known for her work on various TV series including Jem, Teenage Mutant Ninja Turtles, Conan the Adventurer, G.I. Joe, Hypernauts, and Captain Power. She is also known for her original comic book series Sisterhood of Steel as well as work on Conan, Red Sonja, and Elfquest. Marx has also authored several biographies and history books.