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 . Her character was a young adult, around 20 years of age. Wikipedia
Source: Marta Kristen and Mark Goddard – Fifty Years Later and Still Lost in Space https://www.popentertainmentarchives.com/post/marta-kristen-and-mark-goddard-fifty-years-later-and-still-lost-in-space (January 15, 2015)
