Marion Eileen Ross (born October 25, 1928; age 91) is a SpongeBob SquarePants cast member. She voices Grandma SquarePants, SpongeBob's paternal grandmother, in the episodes "Grandma's Kisses," "BlackJack," "The Abrasive Side," and "Pet Sitter Pat" and the video game Employee of the Month.
Marion, born Marian Eileen Ross was born in Watertown, Carver County, Minnesota to Gordon and Ellen (Hamilton) Ross. She lived in Waconia and then moved to Willmar. Eventually, she also moved to Albert Lea, Minnesota. She had change her name to Marion at the age of thirteen. After completing her sophomore high school year, she'd move to Minneapolis, Minnesota studying drama at the MacPhail Center for the Arts and attending Southwest High School. A year later, her family moved to San Diego, California. She graduated from Point Loma High School in San Diego.
Ross enrolled at San Diego State University, where she was named the school's most outstanding actress. After graduation in 1950, she performed in summer theater in La Jolla, California. The director was impressed by her talent and recommended that she try for work in films.
Prior to her SpongeBob SquarePants work, she was well known for her role as Marion Cunningham on the hit American sitcom Happy Days (1974-1984).