Casey Novak is a fictional character on Law & Order: Special Victims Unit, portrayed by Diane Neal. She is the only female Assistant District Attorney (ADA) to have appeared in five complete seasons in any Law & Order series and the third-longest-running ADA in the entire franchise.
Carey Lowell is rumored to return and reprise her regular role as Defense Attorney Jamie Ross in Season 21 also. Law & Order creator Dick Wolf is returning too as an executive producer on the latest season.
Main charactersActorCharacterRank/PositionBenjamin BrattRey CurtisJunior DetectiveCarey LowellJamie RossAssistant District AttorneyAngie HarmonAbbie CarmichaelAssistant District Attorney29 more rows
That honor goes to Roy Thinnes, who played Alfred Wentworth — the show's original district attorney — in the drama's pilot episode, which was shot in 1988 and set to air on CBS. After the network passed on the show, it struggled to find a home and didn't land at NBC until 1990.