Beloved 'Lassie' and 'Lost In Space' actress dies at 100

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. Photos: AP

June Lockhart, the actress beloved for her maternal roles in classic television series Lassie and Lost In Space, has died at age 100.

Lockhart died of natural causes on Thursday (Oct 23), in Santa Monica, California, with her daughter, June Elizabeth, and granddaughter, Christianna, by her side, according to People.