Barash, who was also raised in New York City, began her work in the entertainment industry at the age of five years. During her early years of acting, singing and dancing in classic musicals on stage in New York, Olivia starred as “Baby June” in Gypsy with Angela Lansbury. She was the first child actor to win the acclaimed New York Critic's Circle Award. Moving to Hollywood as a teen with her family, she attended Palisades High School in Pacific Palisades, California and graduated in 1982.