For many TV viewers, Lost in Space defined the science fiction of the 1960s on the small screen. Bill Mumy was the heart of the series, and his performance as Will Robinson arguably made him one of the most recognizable child actors of his era. While many performers do not make the jump from early fame, Mumy managed to forge a career spanning across television, music, writing, and voice work. His work continues to attract interest decades later, and fans remain curious about his life, career, and accomplishments in 2026.

That lasting success has also led many to wonder how much wealth Mumy has accumulated over the course of his career.

In 2026, Bill Mumy's net worth is estimated to be $10 million. Mumy, best known for his role as Will Robinson in the classic TV series Lost in Space, has several income streams from acting roles, voice-over work, and songwriting projects. His long tenure in show business has also allowed him to maintain financial success well beyond his days as a child actor.

Additionally, he has also been paid for his talents as a producer, author, and radio host, which have generated multiple long-term revenue streams over his long career in the entertainment industry. His impressive career boasts more than 400 television episodes and a multitude of films. However, that information about how much Mumy was paid for individual movies and TV shows has never been made public. 

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Beyond his career accomplishments, many fans are also curious about the age of the actor who brought Will Robinson to life. 

Bill Mumy, the Lost in Space star, was born on February 1, 1954, in San Gabriel, California. The actor has turned 72 years old as of 2026. He has been in the entertainment industry for over sixty years. Mumy began his Hollywood career at a young age, 7, to be precise, but was able to transition into adult roles seamlessly and without a fallout that most child actors seem to have had before surfacing again. 

Projects like Babylon 5 even introduced him to a new generation of viewers. His long career has earned him the respect of science fiction fans and television audiences alike.  

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Meanwhile, his enduring popularity is also reflected in the wide range of creative projects that continue to keep him active today. 

In addition to acting, Bill Mumy’s career has been very diversified, transitioning smoothly between classic Hollywood dramas, comic book adaptations, and animated features. Apart from Lost in Space, his many television credits include The Twilight Zone, Going My Way, The Greatest Show on Earth, I Dream of Jeannie, The Adventures of Ozzie and Harriet, Babylon 5, and more. Mumy has also provided voice work for animated series such as Scooby-Doo, Batman: The Animated Series, and The Oz Kids.

He is talented in many areas and can play guitar, bass, keyboards, banjo, mandolin, harmonica, and percussion. He has further released six solo albums and is a member of several bands based in California. He is also a member of the musical duo Barnes & Barnes, who have released nine albums.

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Even in his 70s, Mumy continues to balance multiple creative pursuits, demonstrating the versatility that has defined his career for decades. 

As of 2026, Bill Mumy continues to be active in the entertainment business, juggling acting, music, writing, and guest appearances at fan conventions. He even attended Lost in Space reunions and sci-fi conventions. He also still celebrates the legacy of the iconic series through books, interviews, and special appearances with former cast members. 

Additionally, Mumy still pursues his long-time love of music. He plays with musical projects like 'Action Skulls', hosts The Real Good Radio Hour, and recently released his acoustic album 'Will Power' in 2026. Apart from his music career, he is still doing other creative endeavors, demonstrating the versatility that has kept his career going till now.

The career of Mumy ranges from that of an actor to a sci-fi star, and few entertainers can rival the level of success he has managed to have. His current net worth and ongoing ventures in various fields prove how passionate he still is about entertainment. At the age of 72, he has remained relevant, with his legacy waving far beyond the world of Lost in Space alone.

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Which chapter of Bill Mumy's six-decade career stands out the most? Let us know in the comments.