June Lockhart, star of Lassie, Lost in Space, and much more, passed away on October 25, 2025, just a few months after her landmark 100th birthday. Lockhart wasn’t just a TV legend and a Golden Age Hollywood star; she was one of the most beloved TV mothers of all time, and her TV children all honored her passing on social media.
Read on for emotional tributes from Angela Cartwright and Bill Mumy (her children from Lost in Space) and Jon Provost (her son from Lassie) — those who knew Lockhart not just as a costar and friend, but a mentor and mother figure in her own right.