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June Lockhart, who became a beloved figure to generations of television viewers through her roles in Lassie and Lost in Space, has died at the age of 100. Lockhart died of natural causes on Thursday at her home in Santa Monica, California, family spokesman and long-time friend Lyle Gregory said on Saturday. "She was very happy up until the very end, reading the New York Times and LA Times every day," Gregory said. "It was very important to her to stay focused on the news of the day." From 1958 to 1964, Lockhart portrayed Ruth Martin, the kind-hearted mother who raised the orphaned Timmy (Jon Provost) in the long-running CBS series Lassie. She later took her motherly charm to outer space, playing Maureen Robinson on the science-fiction adventure Lost in Space from 1965 to 1968. What is June Lockhart's Net Worth? June Lockhart was a retired actor known for her extensive career in film and television. Born into a show business family, she began acting on stage at the age of eight. Lockhart's initial works included A Christmas Carol (1938), All This, and Heaven Too (1940), and Son of Lassie (1945). Also Read: 'Lost In Space' Actress June Lockhart Dies At 100 Lockhart's long career has been in films, television, and also voice acting. She had been very active till her retirement in 2021. Her net worth was estimated to be around $8 million in 2025, including earnings from her acting career and royalties. She was best known for her roles on CBS programmes, including Lassie (1958–64), Lost in Space (1965–68), and Petticoat Junction, in which she played Dr Janet Craig. In the 1980s and early 1990s, she appeared as Mariah Ramirez on the ABC soap opera General Hospital. Lockhart's later work included providing the voice of Alpha Control in Netflix's 2021 reboot of Lost in Space, and her final on-screen appearance came in the 2016 film The Remake, where she played Irene O'Connor. Throughout her career, Lockhart appeared in numerous films, including It's a Joke, Son!, C.H.U.D. II: Bud the C.H.U.D., Deterrence, and Super Capers. She also took on guest roles in television shows such as Full House, 7th Heaven, Andy Richter Controls the Universe, and Grey's Anatomy. Lockhart's long career and continued royalties from her work are believed to be the primary sources of her wealth.
