June Lockhart at a Comic and Fantasy convention in 2000 and then at the Daytime Creative Arts Emmy Awards Gala in 2014. Actress June Lockhart was famous in the 1950s and 60s where she performed in both television and film. She is most known for her roles in television shows Lost in Space and Lassie, as well as her role in the film Sergeant York. Lockhart was born on June 25 1925, making her 97 years old.