<P> Hey Arnold ! stars nine - year - old Arnold ( voiced by Toran Caudell ; Phillip Van Dyke ; Spencer Klein ; Alex D. Linz and Mason Vale Cotton ) and his neighborhood friends : Gerald ( voiced by Jamil Walker Smith and Benjamin Flores Jr . ) , a street - smart character who generally serves as the leader of the group , and Helga ( Francesca Smith ) , a girl who bullies Arnold in order to hide the fact that she is in love with him . Bartlett drew inspiration from people he grew up with when creating the characters for the show . </P>
who did the voice of arnold in hey arnold
Toran Caudell Phillip Van Dyke Spencer Klein Alex D. Linz Mason Vale Cotton