“Lassie” and “Lost in Space” star June Lockhart died of natural causes in her Southern California home this week, her family said Saturday. She was 100.

Lockhart played the mother roles in the two popular TV series, but she also won what is now called a Tony Award early in her career in the Broadway production “For Love or Money.”

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She died at her home in Santa Monica, California, on Thursday, with her daughter, June Elizabeth and granddaughter, Christianna, by her side, the family said in a statement.

In “Lassie,” Lockhart played Ruth Martin, and in “Lost in Space,” she played Maureen Robinson. She also played Dr. Janet Craig in “Petticoat Junction.”

Lockhart was long a proponent of the space agency NASA and its m

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