Miriam Flynn is an American actress and voice actress, who is best known as Cousin Catherine in National Lampoon's Vacation franchise and Grandma Longneck in the Land Before Time films. 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" and Mrs. Roberson in Quack Pack. She also played Dr. Berman in Desperate Housewives, Jane in Good Luck Charlie, Mrs. Smorlov in Zeke and Luther, Mrs. Snodgrass in Liv and Maddie and Fay Clancy in Fancy Nancy. She also appeared in other ABC shows.