‘Lost In Space’ Star Asks for Prayers for His Family

A beloved classic TV star is turning to his fans during a deeply personal moment. Bill Mumy, best known for portraying Will Robinson on the 1960s sci-fi series “Lost in Space,” asked followers to send prayers and positive thoughts to his family.

On December 11, the 71-year-old actor shared a heartfelt Instagram post requesting support for his daughter-in-law, Alexa Cline Mumy, as she prepared to undergo open-heart surgery. Alexa is married to Mumy’s son, Seth, 36, and the family’s request quickly drew an outpouring of concern and encouragement from fans.

Bill Mumy Shares an Emotional Prayer Request on Instagram

Mumy posted two photos of Alexa alongside a heartfelt message to his followers.

“FAVOR PLEASE, folks,” Mumy wrote. “I’m asking for prayers, good thoughts, and positive energy sent to my wonderful Daughter-in-Law, Alexa. She’s having open heart surgery tomorrow morning, and all your support will be very much appreciated. Thank you kindly. ✌️❤️🙏🏻.”

The post quickly resonated with fans who have followed Mumy’s career for decades.

Fans Flood the Comments With Support And Encouragement

Messages of love and encouragement poured in from around the world.

“Sending positive thoughts and healing prayers to Alexa 🙏💙,” one fan wrote.

“Hey Billy, sending prayers and good thoughts to Alexa from Australia ❤️🙏,” another added.

“Many prayers sent for sweet Alexa. 🙏💜🙏💜,” a third follower shared.

One supporter reflected on Mumy’s long connection with his audience, writing, “Throughout your career, you’ve been there for your fans. Now, of course, we’re all here for you, your family, and Alexa.”

Legendary Olympic figure skater Tai Babilonia also commented, writing, “Prayers up 🙏🏽💪🏽.”

A Close Look at Mumy’s Family Life

Mumy has often shared glimpses of his close-knit family on social media. In July, he marked Alexa and Seth’s wedding anniversary with a celebratory post.

“Happy 9th Anniversary to Seth & Alexa Mumy! 🥰,” he captioned a photo from their 2016 wedding.

He has also posted photos of the couple’s young children. In 2024, Mumy shared a birthday tribute to his son that included family snapshots.

“Happy 35th Birthday to my son, Seth Davis Mumy,” he wrote. “He makes me proud. Seth is a wonderful father, husband, brother, son, friend, and attorney. He works hard and is truly loved. Time is a bizarre river! Seems like he was just a little boy! Onward. 👍👍🙏🏻❤️”

Mumy married Eileen Joy Davis in 1986. The couple welcomed Seth in 1989, followed by daughter Liliana five years later.

The Actor’s Longstanding Focus on Family

Family has long been central to Mumy’s life. In a past interview with Rock Cellar, he reflected on a moment that shaped him most.

“For a personal moment, I’ll say when my daughter Liliana was born,” he said. “My son Seth was so happy to have a sister.”

As fans continue to send prayers and encouragement, the outpouring of support reflects the lasting bond Mumy has built with audiences across generations.

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