Has two daughters: Jenny Shaughnessy (born on March 18, 1990) and Madelyn Shaughnessy (Maddy) (born February 8, 1995).
Trademark
Her line in Trading Places, "And she stepped on the ball," a node to Auntie Mame, has been reused in modern comedies, which is now known for this movie as Susan plays one of four conceited debutants, who laugh at her "punchine".