Miriam Flynn

Miriam Flynn (born June 18, 1952) is an American voice and character actress. She is best known as Cousin Catherine in the ''National Lampoon's Vacation'' and Grandma Longneck in ''The Land Before Time'' franchises. She has acted in other films and in several television series, the latter including a recurring role as Sister Helen on the Fox/WB sitcom ''Grounded for Life''. Provided by Wikipedia