Mary Claire "Mimi" Kennedy (born September 25, 1948) is an American actress, author, and activist, best known for her performances in television comedies. She co-starred in a number of short-lived sitcoms, before her role as Ruth Sloan on the ABC drama series, Homefront (1991—93).
Kennedy is best known for her role as Abby O'Neil in the ABC sitcom, Dharma & Greg (1997—2002). In film, Kennedy appeared in Pump Up the Volume (1990), Erin Brockovich (2000), In the Loop (2009), Due Date (2010), Midnight in Paris (2011), and The Five-Year Engagement (2012).
She is currently a series regular on the sitcom, Mom, for which she received a Critics' Choice Television Award nomination.