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Miriam Flynn is an American voice actress and character actress who is best known as Cousin Catherine in the National Lampoon's Vacation and Grandma Longneck in The Land Before Time franchises. She is also known for acting in other films and several television series, the latter including a recurring role as Sister Helen on the Fox/WB sitcom Grounded for Life.

For Disney, she voiced Gandra Dee in the DuckTales episode "Super DuckTales".