William "Willy" Zilla is one of the main characters of the My Dad The Rockstar. He is voiced by Joanne Vannicola.
Willy is shown to be a 12-year-old boy with glasses, red hair, wearing a white shirt and an orange sleeveless jacker, blue baggie jeans and red and white sneakers.
Being born as the son of a famous rock star, Willy never had a normal life when he was on tour with his family. he never went to school or had any friends. Until the day his father decide to settle down in the quiet town of Silent Springs.
For a few episode Willy had to changed his name from Zilla to Zillowsky to hide his secret of being the son of Rock Zilla (execpt for his two friends Q Quincy and Alyssa), until in "Mr. Zilla's Opus" when Rock took over as the new Music teacher. According to Willy he is the only one in his family to be the sane one.
Willy aspires to be a musician like his father and grandfather, but instead of Rock and/or Classic he want to be a Jazz man. Willy is also the victim of the school bully Buzz Sawchuck.