Actress who starred in the groundbreaking, interracial-dating-themed 1967 film Guess Who's Coming to Dinner.
She studied art and philosophy at Sarah Lawrence College in New York.
She starred in numerous Broadway and off-Broadway productions and also wrote and produced over ten original plays.
Her maternal aunt was the renowned actress Katharine Hepburn . Hepburn played Houghton's character's mother in Guess Who's Coming to Dinner.