Arnold is a fictional character in the Nickelodeon animated television series Hey Arnold!.His head is shaped like an American football, thus earning him the nickname "Football-Head", by Helga. Throughout the series' run, he was voiced by at least five different voice actors: J.D. Daniels (who did his voice in the pilot), Toran Caudell, Phillip Van Dyke, Spencer Klein (who did his voice in the movie), and Alex D.
Linz. Arnold is a dreamer and an idealist who always tries to see the best in people and to do the right thing. Whenever he sees someone in trouble, Arnold goes out of his way to help them out, even if it is not sensible to do so (an example being when he tried to protect some of his classmates, who had mooned the school principal).
Arnold often acts as the stable center to those around him, whether he is around his "family" in his grandparents' (Dan Castellaneta and Tress MacNeille) boarding house The Sunset Arms, or around his friends at his school, P.S. 118. According to the Parents Day and The Journal episodes, Arnold's adventurous parents, anthropologist Miles and biologist/physician Stella, were doing missions in the jungle of San Lorenzo when they disappeared. According to those episodes, Arnold was born while his parents were on an earlier expedition in the jungle to bring medicine to the natives.
His birth coincided with the eruption of a nearby volcano, which the locals believed to be an indication that Arnold would one day become a messiah of sorts who would save the world from a great danger. Arnold was not told of these events until later in the series when it was revealed by his grandfather. It is unknown how the "prophecy" may have fit into the series had it continued.
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