Warren Leight is an American playwright, screenwriter, film director, and television producer. The Broadway production of his play, Side Man, won the Tony Award for Best Play (Criterion Center Stage/John Golden Theatre). Other works produced on Broadway include Leap of Faith (St. James Theatre) and Mayor (Latin Quarter). Off-Broadway plays include Glimmer, Glimmer & Shine (N.Y.C. Center Stage); Side Man (Classic Stage); and Mayor (Village Gate).

Other plays include A Separate Peace (Susan Stein Shiva Theater); Amici Ascoltate (Duke on 42nd Street); Fear: Network News (Bleecker Street Theatre); Glimmer Brothers (Williamstown Theatre Festival); No Foreigners Beyond This Point (Baltimore Center Stage); and James and Annie (Ensemble Theatre of Cincinnati). 

Screenplays include The Night We Never Met, which he also directed.