Alexander David "Alex" Linz (born January 3, 1989) was an American voice actor who provided the voice of Arnold in the last two episodes of Season 5, which were made after Hey Arnold!: The Movie. He also provided Arnold's voice for the movie's teaser trailer; and in an interview with series creator Craig Bartlett, he said that Alex would have played Arnold in The Jungle Movie, had it been made back in 2001-02.
Compared to previous Arnold actors, Linz's voice is higher-pitched and makes the character sounds much younger.
Outside of Arnold, Linz is probably better known as the voice of young Tarzan in the 1999 animated Disney film, and playing the titular role in the live-action Max Keeble's Big Move.