Marta Kristen

Marta Kristen
Kristen as Judy Robinson in Lost in Space 1965
Born	Birgit Annalisa Rusanen Oslo, Norway
Other names	Martha Annalise Soderquist
Occupation	Actress
Years active	1960–present
Spouses	Terry Treadwell ​ ​ (m. 1964; div. 1973)​ Kevin P. Kane ​ ​ (m. 1978; died 2016)​
Children	1
Website	www.martakristen.com

Marta Kristen is a Norwegian-born American actress.

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.