About Marta Kristen
Martha Annalise Soderquist (born 26 February 1945), known by her stage name Marta Kristen, is an American actress. Born as Birgit Annalisa Rusanen in Norway to a Finnish mother and a German father, she was adopted by an American couple in 1949. Kristen is best known for her role as Judy Robinson, the oldest child of Professor John Robinson and his wife, Maureen, in the television series Lost in Space (1965–1968). Her character was a young adult, around 20 years of age. Kristen's first film role was in the 1963 Walt Disney production of Savage Sam.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.