FILE – June Lockhart, right, who played the character of Ruth Martin, mother of Timmy Martin, played by Jon Provost, left, during the classic series “Lassie,” poses for a photograph with Lassie, 9th generation, during arrivals at CBS’s 75th anniversary celebration Sunday, Nov. 2, 2003, in New York. (AP Photo/Louis Lanzano, File)

June Lockhart, who became a mother figure for a generation of television viewers whether at home in “Lassie” or up in the stratosphere in “Lost in Space,” has died. She was 100.

Lockhart died Thursday of natural causes at her home in Santa Monica, family spokesman Lyle Gregory, a friend of 40 years, said Saturday.

“She was very happy up until the very end, reading the New York Times and LA Times everyday,” he said. “It was very important to her to stay focused o

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