Early life

Simpson was born in Hackettstown, New Jersey, the youngest of three brothers.

After graduating from Bloomsburg University with a Bachelor of Arts in theater, he acted for four seasons at the Williamstown Theatre Festival in Massachusetts.

Career

Simpson made his film debut in the teen comedy Loser (2000), which was followed by guest spots in episodes of NYPD Blue, Cold Case and Carnivàle, as well as roles in the films D.E.B.S., Herbie: Fully Loaded, Stay Alive, Seraphim Falls and David Fincher's Zodiac. In 2008, Simpson starred in The Farnsworth Invention on Broadway. His portrayal of Philo T. Farnsworth was described as "superb" by The Chicago Tribune, and earned him a Theatre World Award.

From 2008 to 2009, Simpson appeared as fictional character Lyle the Intern on The Late Show with David Letterman. During that time, he also appeared in episodes of CSI, My Name is Earl, House and Psych, and had supporting roles in The Invention of Lying and Date Night. Other notable credits include It's Always Sunny in Philadelphia, on which Simpson appears frequently as Liam McPoyle, and the A&E series Breakout Kings, where he starred as Lloyd Lowery.

Most recently, Simpson appeared in the films Abraham Lincoln: Vampire Hunter, The Truth About Emanuel and White House Down. He also appeared as a recurring character on House of Cards.

Personal life

Simpson met actress Melanie Lynskey in 2001, when they both appeared in Rose Red. The pair became engaged in 2005 and married on April 14, 2007, in a chapel near Queenstown, New Zealand.

Lynskey filed for divorce from Simpson on September 25, 2012, citing irreconcilable differences. The divorce was finalized on 23 May 2014.

Filmography

Film

Year	Title	Role	Notes
2000	Loser	Noah
2004	D.E.B.S.	Scud
2005	Herbie: Fully Loaded	Crash
2006	Stay Alive	Phineus
2007	Seraphim Falls	Big Brother
2007	Itty Bitty Titty Committee	Chris
2007	Zodiac	Mike Mageau
2007	Final Draft	Chad
2008	A Quiet Little Marriage	Jackson
2009	The Mother of Invention	Martin Wooderson
2009	The Invention of Lying	Bob
2009	Taking Chances	Charlie Cabonara
2010	Good Intentions	Kyle
2010	Date Night	Armstrong
2011	The Big Bang	Niels Geck
2012	Abraham Lincoln: Vampire Hunter	Joshua Speed
2012	Hello I Must Be Going	Phil
2013	The Truth About Emanuel	Arthur	Best Acting Ensemble - Ashland Independent Film Festival
2013	White House Down	Skip Tyler
2013	Knights of Badassdom	Ronnie Kwok
2014	Gravy	Stef
2014	The Last Time You Had Fun	Jake

Television

Year	Title	Role	Notes
2002	Rose Red	Kevin Bollinger	3 episodes
2002	The Division	Sean Townsend	Episode: "Forgive Me, Father"
2002	24	Chris	3 episodes
2003	NYPD Blue	Mike	Episode: "Bottoms Up"
2003	Cold Case	Ryan Bayes	Episode: "Churchgoing People"
2005	Carnivàle	Lee	2 episodes
2005-present	It's Always Sunny in Philadelphia	Liam McPoyle	7 episodes
2006	My Name is Earl	David Hayes	2 episodes
2008	Eleventh Hour	Will Sanders	Episode: "Resurrection"
2008	CSI: Crime Scene Investigation	Thomas Donover	2 episodes
2008-2009	Late Show with David Letterman	Lyle	15 episodes
2009	House	Father Daniel Bresson	Episode: "Unfaithful"
2009	Virtuality	Virtual Man	Pilot
2009-2013	Psych	Mary Lightly	4 episodes
2010	Party Down	Jackal Onassis / Dennis	Episode: "Jackal Onassis Backstage Party"
2011	How I Met Your Mother	Pete Durkenson	Episode: "The Naked Truth"
2011-2012	Breakout Kings	Lloyd Lowery	23 episodes
2013	Unsupervised	Matthew / Dean Jacobs	Voice Episode: "The Great Traveler's Road"
2013	Person of Interest	Logan Pierce	Episode: "One Percent" (Season 2)
2014-2015	House of Cards	Gavin Orsay	8 episodes Pending - Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series Nominated - Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Drama Series
2014	The Newsroom	Jack Spaniel	3 episodes
2016	Westworld	William
2016	Hap & Leonard	Soldier

Web

Year	Title	Role	Notes
2007	Girltrash!	Valentine	1 episode

Video games

Year	Title	Role	Notes
2008	Wanted: Weapons of Fate	Wesley "The Killer II" Gibson	Video game Replacing James McAvoy

[ Source: Wikipedia ]