Jeff Garcia, the comedian and voice actor best known for bringing Sheen Estévez to life in “The Adventures of Jimmy Neutron: Boy Genius,” has died at 50. News of his passing was confirmed on December 10, leaving fans and colleagues stunned by the loss of a performer whose voice defined a generation of animated comedy.

His son, Jojo Garcia, announced his death in a public tribute, calling his father “a unique soul” and sharing how deeply admired he was as both a parent and an artist. Garcia had faced a series of serious health complications throughout the year, a difficult stretch that began with a brain aneurysm in the spring. He later suffered a stroke, followed by a series of hospitalizations connected to pneumonia and respiratory struggles. On December 8, he was admitted again due to worsening breathing issues. The next day, his lung collapsed, and after further complications, he was taken off life support.

Garcia’s impact on television animation was immediate and unforgettable. When “Jimmy Neutron: Boy Genius” premiered in 2001, his portrayal of Sheen Estévez became one of the show’s defining performances. His fast-talking delivery, wide–eyed enthusiasm and completely unpredictable energy helped turn Sheen into a breakout character. The success of the film led to a TV series that ran for years, and eventually, Sheen received his own spin-off, “Planet Sheen,” with Garcia continuing in the role.

Beyond Nickelodeon, Garcia worked across film and television, contributing to animated hits such as “Barnyard,” the “Happy Feet” films and the “Rio” franchise. His career extended into stand-up comedy and live-action roles, showcasing a range that many fans may not have realized he possessed. To colleagues who worked with him, Garcia’s natural comedic instincts were matched by his warmth and generosity, traits often highlighted by those paying tribute.

The news of his death has resonated deeply, especially with fans who grew up in the early 2000s. For many, Garcia’s voice was a constant presence during childhood, whether through after-school reruns or weekend marathons of animated favorites. His portrayal of Sheen remains one of the most distinctive comedic performances in children’s television, bursting with eccentricity, charm and heart.

Garcia’s passing marks a profound loss for the animation and comedy communities. His body of work created memories for millions of viewers, and the joy he brought to his roles continues to echo long after the credits rolled. As tributes pour in, the sentiment remains consistent: Jeff Garcia made people laugh, often when they needed it most. His legacy now lives on through the characters he helped define and the audiences who will keep those performances alive.