June Lockhart, popular actress of the 1950s and ’60s known for her roles in “Lost In Space,” “Lassie,” and “Meet Me in St. Louis,” died of natural causes on Oct. 23 in Santa Monica, Calif. She was 100.

June Lockhart, the actress known for Lassie, Lost in Space and Meet Me in St. Louis, has died. She was 100. The Tony-winning actress from the Golden Age of Hollywood died Thursday night of natural causes at her Santa Monica home with daughter June Elizabeth and granddaughter Christianna by her side.

Lockhart’s long career began in Hollywood’s Golden Age with such films as “A Christmas Carol” and “Meet Me in St. Louis.”

June Lockhart, known for her roles in "Lassie" and "Lost in Space" passed away at her Santa Monica home with her daughter and granddaughter by her side.

June Lockhart, the golden-age film actress and star of TV shows "Lassie" and "Lost in Space," has died, according to several media reports. She was 100. Lockhart died of natural causes on Thursday, Oct.

The actress died on Thursday, Oct. 23 at 9:20 p.m. local time in Santa Monica, Calif., PEOPLE can confirm. Lockhart's cause of death was natural causes. Her daughter, June Elizabeth, and her granddaughter,

Lockhart had guest appearances on some of the most popular shows in television history, including "The Beverly Hillbillies," "Petticoat Junction," "General Hospital," "Roseanne," "Full House," and even "Grey’s Anatomy" in her later years.