Kenneth Lonergan is an American playwright, screenwriter, and director known for his work in film and theater. He gained significant recognition for his films such as You Can Count on Me and Manchester by the Sea, the latter of which earned him an Academy Award for Best Original Screenplay. Lonergan's storytelling often explores complex human relationships and emotional struggles. In addition to his film work, Lonergan has written several acclaimed plays, including This Is Our Youth and Lobby Hero. His unique voice and ability to capture the nuances of everyday life have made him a respected figure in contemporary American theater and cinema.