Grace Johnston's acting career began when she was a mere four years old. She also appeared in the TV movie "God Bless the Child" (ABC, 1987-88). Johnston worked in television around the start of her acting career with a role on "The Cosby Show" (NBC, 1984-1992). She continued to work steadily in television throughout the eighties and the early 2000s, appearing on "Just Like Family" (Disney, 1988-89). She also appeared in the TV special "Notes For My Daughter" (ABC, 1994-95). Her work around this time also included a part on the TV movie "One More Mountain" (ABC, 1993-94). She also worked in television during these years, including a part on "Just Like Family" (Disney, 1988-89). Additionally, she later acted in the action flick "One Good Cop" (1991) with Michael Keaton. She also lent her voice to "Ira Sleeps Over" (HBO, 1991-92). Johnston most recently acted on "The Closer" (TNT, 2004-2011).