Curtis was born in Santa Monica, California. She is the daughter of actor Tony Curtis and actress Janet Leigh. Her paternal grandparents were Hungarian Jewish immigrants and two of her maternal great-grandparents were Danish. Curtis's parents divorced in 1962, after which her mother married Robert Brandt. Curtis has an older sister, Kelly Curtis, who is also an actress, and several half-siblings (all from her father's remarriages), Alexandra, Allegra, Ben, and Nicholas Curtis (who died in 1994 of a drug overdose). Curtis attended Westlake School (now Harvard-Westlake School) in Los Angeles and Beverly Hills High School, and graduated from Choate Rosemary Hall. Returning to California in 1976, she attended the University of the Pacific in Stockton, California. She considered majoring in social work, but quit after one semester to pursue an acting career.