Arleen Sorkin

as Ms. Q (Studio Secretary)

as Harley Quinn (voice)(2 eps)

as Harley Quinn (voice)

as Harley Quinn (voice)(1 ep)

as Harley Quinn / Dr. Harleen Quinzel (voice)(31 eps)

as Harley Quinn (voice)

as Harley Quinn (voice)(6 eps)

as Harley Quinn (voice)(3 eps)

as Arleen Sorkin

as Mrs. Bambi (voice) (uncredited)

as Peg Ferman

as Self(1 ep)

as Rachel(1 ep)

as Harley Quinn (voice)(9 eps)

as Monica

as Veronica (voice)(1 ep)

as Marcia

as Manicurist

as Donna di Angelo(1 ep)

as Geneva(3 eps)

as Geneva(54 eps)

as Judy

as Diner Waitress

as Woman at Party (uncredited)

as Woman in Fur Coat (uncredited)(1 ep)

as Calliope Jones(1545 eps)