Hollywood Mourns: ‘Lost in Space’ Icon June Lockhart Dies at 100, Leaving a Lasting Legacy Veteran actress June Lockhart, best known for her iconic roles as the loving mother in Lassie and Lost in Space, has passed away at the age of 100. The celebrated star died of natural causes at her Santa Monica home, according to her family spokesperson. Lockhart’s career spanned over seven decades, earning her recognition as one of television’s most enduring maternal figures who helped define the golden era of American TV.

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