Marta Kristen (born Birgit Annalisa Rusanen on February 26, 1945 in Norway) is an American actress, specializing in character-type parts.

The naturally blonde-headed Kristen is best known for her role as Guy Williams's and June Lockhart's beautiful daughter, Judy Robinson, in the cult television series Lost in Space (1965-1968). Marta played the part of the space family's eldest child, a Read more...

Kristen was born to a Finnish mother and a German soldier father who was killed during World War II. She was adopted in 1949 by an American couple from Detroit, Michigan and was renamed Marta. She moved to Los Angeles, California, with her family in 1959 and is a graduate of Santa Monica High School.

Her first success in acting was the role of Lorelei in the 1965 movie Beach Blanket Bingo. Read more...