Agents of S.H.I.E.L.D.' star Clark Gregg reflects on the 10th anniversary of his first appearance in Marvel Cinematic Universe, as Agent Phil Coulson, in 2008's 'Iron Man.' ...

Clark Gregg is best known for his role of Phil Coulson, but not just from his time on Agents of SHIELD. Coulson has been a part of the Marvel Cinematic Universe since the first film, Iron Man ...