Patty McCormack is an American actress with a career in theater, films and television.
She achieved success as a child actress, and received a nomination for an Academy Award for Best Supporting Actress for her performance in The Bad Seed. Her acting career has continued with supporting roles in film and television, including a more recent performance as Pat Nixon in Frost/Nixon. McCormack was born Patricia Ellen Russo in Brooklyn, New York, the daughter of Elizabeth, a professional roller skater, and Frank Russo, a fireman. She is an aunt of fellow actor and New York City lawmaker Alfred Cerullo.
She was a child model at the age of four and began appearing on television at the age of seven. She made her motion picture debut in Two Gals and a Guy and appeared in the television series Mama from 1953 to 1956.