|Age:||Unknown (likely late 60s to mid 70s)|
Morty Jr. (great-grandson)
|First seen in:||Anatomy Park|
|Main voice actor:||Patricia Lentz|
Joyce made her first appearance in the episode "Anatomy Park", where Jerry wanted to have a traditional Christmas holiday and kept pushing his family to be lively for when his parents visited. She and Leonard visited the Smith family for Christmas. They also brought along a man named Jacob with them. They explained to Jerry that Jacob was a motivational person who lived with them to help bring joy back into their marriages. Jacob's main purpose was to have sex with Joyce on account of Leonard's impotence. Leonard would also watch them doing it from a closet, and according to him, almost always dressed as Superman. Jerry was shocked and he felt very miserable. He ended up hating his parents for this.
She was also complimentary to Jacob when he helped Summer's boyfriend Ethan with his emotional issues.
Joyce is an old Caucasian lady with wrinkly skin and big hair. Her hair is yellow and dim and it's very poofy and wavy. She wears a red turtleneck sweater and a white jacket. She also wears a light purple skirt with a black belt.