Jeff Garcia, the stand-up comedian and actor best known for lending his distinct, high-energy voice to the fan-favorite character Sheen Estevez in the Jimmy Neutron franchise, has sadly passed away at the age of 50.
Jeff Garcia, the voice of Sheen Estevez in ‘Jimmy Neutron’ / IMDb
Garcia was pronounced dead early Wednesday morning, December 10, 2025, in a Southern California hospital after being removed from life support, surrounded by his loving family and friends.
A Heartfelt Farewell from His Son
The tragic news was first confirmed by his son, Joseph “JoJo” Garcia, who shared a deeply emotional goodbye letter to his father on Instagram. The post, which accompanied a carousel of photos showing Garcia throughout his life, quickly spread across social media, becoming the source for confirming the beloved voice actor’s passing.
JoJo’s tribute praised his father’s unique spirit and talent, stating in part:
“My father was a unique soul. He was unapologetically himself and I will always admire the love, compassion, and drive that he had… The talent my father possessed was truly one of a kind…”
Jeff Garcia leaves behind his two children, Savannah and Joseph.
Final Months and Legacy
The comedian’s death followed a difficult period of health struggles. According to reports, Garcia had been battling multiple complications over the last several months, including a brain aneurysm and a stroke, with his final decline attributed to issues arising from pneumonia and a collapsed lung.
A Voice That Defined a Generation
For millions of viewers who grew up on Nickelodeon in the 2000s, Garcia’s voice was instantly recognizable as Sheen Estevez, the ultra-hyperactive, obsessive best friend of Jimmy Neutron. Sheen was famous for his unwavering devotion to the fictional superhero “Ultra Lord,” his frantic energy, and his endless, often chaotic, catchphrases.
Jeff Garcia was Sheen Estevez’s voice in Jimmy Neutron / IMDb
Garcia originated the role in the 2001 film Jimmy Neutron: Boy Genius and carried the character through the subsequent animated series, The Adventures of Jimmy Neutron, Boy Genius, and its spin-off show, Planet Sheen. His comedic timing and quick wit were instrumental in bringing the character’s unique, manic charm to life.
