Pepper O'Brien is an American motion picture producer. She is an Associate Producer for Boardwalk Empire. She has worked on the first, second, third and fourth seasons. She was a Production Controller for the first season before being promoted to Associate Producer for the second season. She has been active since 1988 and has also worked on the films Jungle 2 Jungle (1997), One True Thing (1998), Music of the Heart (1999), and National Treasure (2004) and the series Kidnapped and Damages.