June Lockhart, who starred in television shows such as Lassie and Lost In Space, has died at the age of 100.

The US actress died of natural causes at her home in Santa Monica, California, on Thursday, according to family spokesman Lyle Gregory.

He said: "She was very happy up until the very end, reading the New York Times and LA Times every day.

"It was very important to her to stay focused on the news of the day."

Image: (L) June Lockhart, Lassie, and Jon Provost in 1963. Pic: Everett/Shutterstock

For more than 200 episodes between 1958 and 1964, she played the role of Ruth Martin, who raised the orphaned Timmy (Jon Provost) in Lassie - a show about the adventures of a brave and intelligent Rough Collie dog.

And from 1965 to 1968 spanning over 80 episodes, Lockhart was Maureen Rob

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