|Portrayed By||Marta Kristen|
|Mother||Maureen Robinson (Original Series Role)|
|Father||John Robinson (Original Series Role)|
|Brother(s)||Will Robinson (Original Series Role)|
|Sister(s)||Penny Robinson (Original Series Role)|
- Full name: Judith Elana Robinson
- Birth date: February 26, 1978
- Birth place: Los Angeles, California, USA
- Height: 5 feet, 4 inches
- Weight: 108 pounds
- Eyes: Blue…Hair: Blonde
- Hobbies/interests: Acting, singing, popular music and "sleeping in late"
The original pilot introduces Judy as: Judith, aged 19, who heroically postponed all hopes in the musical/comedy field for at least two centuries.
Judy Robinson was a backward, shy child who had trouble making friends, partly because her parents were often away as they pursued their scientific careers. She spent a few years living with her Aunt Colleen in Los Angeles, where she became very close to her cousin, Joan—"a relationship that continued up to the day of the Jupiter 2 launch."
Judy became better adjusted as she entered her teenage years, and attracted quite a few boys. Her mother refused to let her date until age 16, however.
During her high-school years, she spent her summers at the United States Space Corps Training Center in Houston, Texas, where, in addition to studying academic subjects, she learned about survival in space, the operation of Jupiter 2 equipment, and spacewalking.Although above average in intelligence, Judy did not inherit her parents' superior intellect. In her own words, she "never really cared much for school," but found she was talented at acting, singing and dancing. She planned to pursue a career in one of those areas.Her plans had to change when the Robinson family was chosen for the colonization mission. Always emotional and slightly rebellious, Judy didn't want to join her family on the mission at first.
She changed her mind when Major Donald West was selected to be the Jupiter 2's pilot. They hit it off immediately because of their complementary personalities: Both are impulsive, but Judy is compassionate and caring, while Don is, in her father's words, "a real hothead." Though she once complained to her mother that she didn't have more men to choose from, Judy and Don have become very close while lost in space.