June Lockhart passed away of natural causes on October 23, 2025, at the age of 100. She died at her home in Santa Monica, California, and her daughter June Elizabeth and granddaughter Christianna were by her side.
Lockhart was an extremely accomplished actress whose career spanned decades. She started acting when she was 8 years old, but she was best known to TV lovers as the mother in Lassie and Lost in Space. She also had key roles in several beloved films including Meet Me in St. Louis and All This and Heaven Too.
June Lockhart inspired many future astronauts with her role in Lost in Space and felt proud of that. NASA honored June’s impact on space exploration by awarding her the “Exceptional Public Achievement Medal.”
In a press statement, her daughter June Elizabeth said, “Mommy always considered acting as her craft, her vocation, but her true passions were journalism, politics, science and NASA. She cherished playing her role in ‘Lost in Space’ and she was delighted to know that she inspired many future astronauts, as they would remind her on visits to NASA. That meant even more to her than the hundreds of television and movies roles she played.”
“Now, the woman who loved to fly, has embarked on her last adventure. With our hearts full of love and pride in her accomplishments, we will miss this truly remarkable woman, mom and grandmama. We reflect on her life, and we feel lucky to have been part of her journey,” her family shared as part of her obituary.
June’s onscreen families are missing her, too. Here’s what celebrities are posting to honor the TV and space legend.
Angela Cartwright Remembers June Lockhart as Smart, Quick, and Funny
Angela Cartwright played June Lockhart’s daughter in Lost in Space. Upon hearing the sad news, she posted to Facebook, “I was so very sad to hear that June Lockhart has passed away. She played my mom on ‘Lost in Space’, and I’ll always treasure our time together on and off the screen. So smart, quick, and funny — she filled her 100 years with curiosity, laughter, and rock ‘n’ roll. I can only imagine she’s feeling right at home as she steps off this planet and into the stars.”
Jon Provost Remembers June For Her ‘Kind Heart and Open Mind’
Jon Provost, who played June Lockhart’s son Timmy on Lassie, posted to Facebook, “I have some sad news, we have lost another movie and television icon, my TV mom, June Lockhart has passed. June and I worked together on lassie from 1958 to 1964, she truly was my second mother.”
“I remember some advice June gave me early on. We were on the set and I was misbehaving a bit, being a little mischievous. June took me aside, and very firmly explained to me that we were professionals and that we had a job to do. She told me that I was a young boy playing a young boy, but that one day I would be an adult, playing an adult like her. June was a true professional, with a kind heart and an open mind,” he added.
“We kept in touch all these years after Lassie until recently, we never missed a Birthday card, Christmas card and phone calls. Love you, June, and I will miss you a bunch.”
Melissa Joan Hart Recalls June’s Love for Storytelling
June Lockhart acted with Melissa Joan Hart in the 2007 Christmas movie “Holiday in Handcuffs”. Hart posted an emotional video on Facebook after learning about June Lockhart’s passing. She also shared this alongside the video, “Your example of a hardworking woman in hollywood will stay with me. You are not afraid to take jobs from Big movies to small movies to soap operas to animation. You were a true working Actress and exemplify what it means to live for love of the creative aspect and storytelling.”
Singer-Songwriter Stephen Bishop Thinks of June As a ‘Beautiful Soul’
Stephen Bishop posted his sorrow about June’s passing alongside of the photo of the two friends. He shared, “Sad to learn that my friend June Lockhart has passed away at 100. I was lucky to know her, a true legend. She was as kind and gracious in person as she was talented on screen. From Lassie to Lost in Space, her legacy will live on forever. Rest in peace, June.” In the comment section, he added, “A beautiful soul, she will be missed.”
Songwriter-Musician Diane Warren Shares Her Love for June Lockhart
Diane Warren replied to Stephen Bishop’s tribute post to June Lockhart. She commented, “Loved her!!! Lost In Space and Lassie. Bye-bye, childhood. Rest in Power, June Lockhart.” Bishop replied with emojis of a broken heart and additional hearts.
Kathy Garver Remembers June Lockhart as a ‘Beautiful Soul’
Kathy Garver, who acted with June Lockhart in Death Valley Days, posted a Facebook tribute to the star. She stated, “Sad to say goodbye to June Lockhart, who died on Thursday at the age of 100. A well-lived life fulfilled with wonderful roles and beautiful family. She played my mentor in an episode of Death Valley Days as an accomplished librarian to my rendition of a young Isadora Duncan. We remained in touch for many years. And she even announced on a talk show when I had not told anyone that ‘Kathy, you’re pregnant'”
Garver continued, “She just had an inner sense of people and engaged in their energies. Her beautiful soul will take flight to, in heaven, rest along with my husband David and dear sister Beverly. I know they will welcome her with warmth and love.”
Bill Mumy Remembers June Lockhart as Brilliant
Bill Mumy, who played June Lockhart’s son on “Lost in Space”, paid tribute to the actress with a photo of the two of them from the show. He shared, “Goodbye to the brilliant June Lockhart. A one-of-a-kind, talented, nurturing, adventurous, and non-compromising Lady. She did it her way. June will always be one of my very favorite moms. 100 years here. Wow! R.I.P. “
Jerry Buteyn Reflects on June Lockhart as ‘Beautiful, Talented’
Photographer Jerry Buteyn shared his tribute to Lockhart on Instagram, “A beautiful, talented soul that graced this planet for 100 years. Godspeed, June!!! Thank you for the dance all those years ago!!!” He also added emojis to his post to emphasize his care for the actress.
Jean-Pierre Dorléac Credits June Lockhart for His Career as a Costume Designer
Jean-Pierre Dorléac, costume designer and June’s long-time friend, shared on 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!!!” He concluded his post with lots of hearts for emphasis of his love for June.
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