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Twin sister of Lindsay Greenbush, sister of Clay Greenbush. Daughter of Billy Green Bush. Graduated from Santa Monica High School in 1988. Earned an associate's degree in animal science from Pierce College in Woodland Hills, CA. Earned her pro-rodeo permit. Is the West Coast's top-ranked barrel racer. Inducted (as a cast member of "Little House on the Prairie") into the Hall of Great Western Performers of the National Cowboy and Western Heritage Museum in 1998. Aunt of Katlynn Danae Bush. Daughter of Carole Kay Bush. Has changed the way she spells her name from Robin to Robyn, to make it look more feminine.