Sylvia Sidney (born Sophia Kosow; August 8, 1910 – July 1, 1999) was an American actress of stage, screen and film, with a career spanning over 70 years, who first rose to prominence in dozens of leading roles in the 1930s. Sidney later came to be known for her role as Juno, a case worker in the afterlife, in Tim Burton's film Beetlejuice. She won a Saturn Award as Best Supporting Actress for this performance. She also was nominated for the Academy Award for Best Supporting Actress for her performance in Summer Wishes, Winter Dreams (1973).
Sidney, born Sophia Kosow in The Bronx, was the daughter of Rebecca (née Saperstein), a Romanian Jew, and Victor Kosow, a Russian Jewish immigrant who worked as a clothing salesman. Her parents divorced by 1915, and she was adopted by her stepfather Sigmund Sidney, a dentist. Her mother became a dressmaker and renamed herself Beatrice Sidney. Now using the surname Sidney, she became an actress at the age of 15 as a way of overcoming shyness. As a student of the Theater Guild's School for Acting, Sidney appeared in several of its productions during the 1920s and earned praise from theater critics. In 1926, she was seen by a Hollywood talent scout and made her first film appearance later that year.