Pretty, blonde, full-figured actor of TV and several feature films who, after ending up on the editing room floor in her first feature, "Three Amigos" (1986), enjoyed the attention she received as the woman in a series of Diet Pepsi ads for whom Michael J. Fox almost literally goes through hell and high water. O'Grady kept busy in guest spots on a variety of TV shows including "Matlock," "Cheers" and "China Beach" (dueting on "These Boots Are Made for Walkin'" with fellow guest star Nancy Sinatra) and played Chad Lowe's leading lady in the cross-dressing teen comedy, "Nobody's Perfect" (1989). TV-movies such as "Parker Kane" (1990) and "The Hit Man" (1991) began to come her way, and O'Grady got a break when she joined the cast of the controversial police drama series, "NYPD Blue" (1993-96) during its first season. Her warm-hearted secretary Donna eventually began an affair with Det. Medavoy (Gordon Clapp) and managed to avoid being pigeonholed as a stereotypical dumb blonde.