Clark Gregg is an American actor best known for his starring role as Richard Campbell in the television sitcom The New Adventures of Old Christine, from 2006-2010.
He also has a starring role as Phil Coulson, a S.H.I.E.L.D. agent who oversees many of the division's field operations, in the superhero science fiction comedy-drama television series Marvel's Agents of S.H.I.E.L.D.
He also played the recurring role of FBI Special Agent Mike Casper in eight episodes of the drama series The West Wing, from 2001-2004.
Born in Massachussetts, Boston Gregg went to Ohio Wesleyan University and then did a BFA in Drama at the New York University, Tisch School of the Arts in 1986.
Clark made his theater debut in Boys' Life and appeared on-stage in A Few Good Men, The Old Boy, Unidentified Human Remains, Mojo and The Night Heron.
He co-founded New York's Atlantic Theater Company with David Mamet and William H. Macy, with whom he studied at NYU, and has also directed and written for the theater.
Clark's television credits include a recurring role as Agent Michael Casper on The West Wing as well as guest roles on The Shield, Will & Grace, Sports Night, Sex and the City and The Practice.
He also featured in the television movies Tyson (1995) and Live from Baghdad (2002).
His feature film credits include
The Usual Suspects (1995), State and Main (2000), We Were Soldiers (2002), The Human Stain (2003), Spartan (2004), In Good Company (2004), When a Stranger Calls (2006), In the Land of Women (2007), Iron Man (2008) and Iron Man 2 (2010), 500 Days of Summer (2009) and Thor (2011).
He also wrote the screenplay for the film What Lies Beneath (2000), starring Harrison Ford and Michelle Pffeifer.
Clark is married to Dirty Dancing actress Jennifer Grey. They got married in July 2001 and have one daughter, Stella.