|Portrayed by||Alyson Reed|
|First appearance||Mystery Date|
|Final appearance||Mystery Date|
|Other Relations|| Joan Holloway (Daughter-in-law)|
Kevin Harris (Grandson)
Ruth his the mother of Greg Harris. She made her only appearance in Mystery Date. In an attempt to try and have a pleasant evening with Greg, Joe Harris, and her in-laws Joan Holloway and Gail Holloway and her grandson Kevin Harris celebrating Greg's return from the army; Ruth accidentally let slip that Greg volunteered to go back on his on accord, despite becoming a father.