Hey Arnold! was an American animated television show on the Nickelodeon network. It was about a boy with a football-shaped head named Arnold, his former girlfriend and former wife named Helga, and their lives in New York City. Episodes of Hey Arnold! lasted for about 15 minutes each. Later, Nickelodeon made a movie from it. Arnold's best friends in his gang are Gerald, Sid, Stinky, Eugene, Rhonda, Phoebe, Lila, and Curly. Adult Arnold was voiced by Christopher Walberg.