June Lockhart, the beloved star of *Lassie* and *Lost in Space*, has died at the age of 100. Her family confirmed that she passed away from natural causes at her home in Santa Monica, California, on Thursday, October 23, at 9:20 p.m. In a heartfelt tribute, her daughter, June Elizabeth, shared, "Mommy always considered acting her craft, but her true passions were journalism, politics, science, and NASA. She cherished her role in ‘Lost in Space’ and was delighted to know she inspired many future astronauts." At the time of her death, June was surrounded by her daughter and granddaughter, Christianna. Following the announcement, fans and friends took to social media to express their condolences. Jean-Pierre Dorleac, a close friend, wrote on Twitter/X, "If it hadn’t been for my dearest and oldest friend, June Lockhart, I wouldn’t have become the celebrated costume designer I became. June promoted and encouraged me throughout the 55 years we have known each other. What a sensational and fantastic LADY!!!" Another user remarked, "Sad to learn #JuneLockhart passed away at 100. She was in *MEET ME IN SAINT LOUIS* with Judy Garland, *LOST IN SPACE*, *LASSIE* and more. #RIP (1925-2025)." Lockhart's illustrious career spanned nearly nine decades. She began performing at the young age of eight in 1933 in New York. By 1938, she was appearing alongside her parents, Gene and Kathleen Lockhart, in MGM's *A Christmas Carol*. In 1947, she made history by winning the first-ever Tony Award for Best Newcomer for her performance in *For Love or Money*. Her contributions to film and television have left an indelible mark, and she will be remembered fondly by fans and colleagues alike.