Glenn Fleshler (born September 24, 1968) is an American theater, film, and television actor. Trained at New York University's Tisch School of the Arts, he is best known to the general public for his intense portrayals of complex and often menacing characters. His television career is marked by iconic roles such as the bootlegger George Remus in the HBO series *Boardwalk Empire* and the serial killer Errol Childress in the first season of *True Detective*. He has also played lawyer Orrin Bach in *Billions* and mobster Goran Pazar in *Barry*, demonstrating notable versatility. His film career includes appearances in movies such as *Joker* (2019) and *A Most Violent Year* (2014). Also active and acclaimed in theater, he has won two Screen Actors Guild Awards along with the cast of *Boardwalk Empire* for Outstanding Performance by an Ensemble in a Drama Series.