Jeff Garcia, best known for voicing Sheen Estevez in Jimmy Neutron: Boy Genius and its Nickelodeon spinoff, has tragically passed away at the age of 50, as confirmed by his son.

Jeff Garcia, the energetic comedian and prolific voice actor whose work defined a generation of animated favorites, has died at 50.

Though his face was not widely recognized, Garcia’s voice became iconic through his work in animation.