Negasonic Teenage Warhead (Ellie Phimister) is a fictional character appearing in American comic books published by Marvel Comics. The character was created by Grant Morrison and Frank Quitely, and named after the song "Negasonic Teenage Warhead" by Monster Magnet. The character is a mutant who displays telepathic and precognitive powers, and is a student of Emma Frost. She is portrayed by Brianna Hildebrand in the Deadpool live action films.
