Derek Richardson is an American actor best known for his roles in the feature films Dumb and Dumberer: When Harry Met Lloyd (2003) and Hostel (2005); and as Patrick Bachelor in the television dramedy series Men in Trees, from 2006-2008.
He currently stars as Nolan in the sitcom Anger Management, since 2012.
A native of upstate New York, Richardson began his career with a guest-starring role on Law & Order. Soon after moving to Los Angeles, he landed a recurring role on Felicity as Keri Russell's love interest.
He has guest starred on such shows as House, Psych and American Horror Story as Jessica Lange's attorney. Additionally, Richardson starred in Hostel, directed by Eli Roth and executive produced by Quentin Tarantino, as well as the ABC series Men in Trees with Anne Heche.