Mumble is the main protagonist of Happy Feet and the deuteragonist of Happy Feet Two. He is Memphis and Norma Jean's son, Gloria's husband, Erik's father, and Ramón and Lovelace's best friend. He is unique that he is the only emperor penguin to not have a heartsong, and the first to be able to tap dance.
He is voiced by Elijah Wood as an adult, who also played Frodo Baggins.