June Lockhart , the actor best known for her role as the matriarch in the TV series " Lassie ," has died, her family spokesperson confirmed to CBS News. She was 100 years old.

Lockhart died of natural causes at home in Santa Monica, California, with her daughter, June Elizabeth, and granddaughter, Christianna, by her side, her spokesperson said Saturday in a statement.

Her family said in the statement, "We will miss this truly remarkable woman, mom and grandmama."

Born in New York on June 25, 1925, Lockhart was the daughter of Oscar-winning actor Gene Lockhart and actor Kathleen Lockhart. She made her professional debut at age 8, playing Mimsey in a Metropolitan Opera production of Peter Ibbetson. She later made her screen debut in MGM's version of "A Christmas Carol", playing the

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