A baby-faced character actor, almost invariably cast in teenaged roles, Max Casella is perhaps best known as the wisecracking, sexually frustrated, Runyonesque sidekick to Neil Patrick Harris on the ABC comedy series about a pubescent physician, "Doogie Howser, M.D." (1989-93). The stage-trained actor was raised in the Boston area and made his professional acting debut in a local production of "Cyrano de Bergerac" in 1981. After achieving prominence as a TV player, Casella segued to movies with a supporting turn as the wisecracking Racetrack in the ill-fated musical "Newsies" (1992). He went
