Actor Michael Zegen first gained prominence with a comedic role on the "Late Show with David Letterman" but has since made his name on TV dramas. Zegen got his start in the early 2000s with recurring appearances on David Letterman's talk show as "Dwight the Troubled Teen." He then appeared on the drama "Rescue Me" as Damien Keefe, which he parlayed into a regular part. He also had a supporting role in the indie film "Adventureland" in 2009. and a recurring role on the comedic drama "How to Make It in America." Beginning in 2011 he appeared as Benny Siegel on the period crime drama "Boardwalk Empire."