Robert Clark Gregg portrayed Phil Coulson in Iron Man, Iron Man 2, Marvel One-Shot: The Consultant, Thor, Marvel One-Shot: A Funny Thing Happened on the Way to Thor's Hammer, The Avengers and Captain Marvel.
He also portrays the character in Agents of S.H.I.E.L.D. and Agents of S.H.I.E.L.D.: Slingshot and the character's Life-Model Decoy in the Agents of S.H.I.E.L.D. episodes The Man Behind the Shield and Self Control.
- Clark Gregg is the father of Stella Frances Gregg. He previously worked with her in Trust Me which he directed.
- Clark Gregg voiced alternate versions of Phil Coulson in Ultimate Spider-Man, Lego Marvel Super Heroes, Marvel Heroes and Lego Marvel's Avengers.
- Clark Gregg worked again with Joss Whedon, Jillian Morgese, Ashley Johnson and Alexis Denisof in Much Ado About Nothing.
- Clark Gregg previously worked with Amy Acker in Much Ado About Nothing, and personally asked her to take the role of Audrey Nathan.
- Clark Gregg previously worked with Spencer Treat Clark and Reed Diamond in Much Ado About Nothing.
- Clark Gregg previously worked with Wilmer Calderon and Catherine Dent in The Shield.
- Clark Gregg previously worked with Jude Law in A.I. Artificial Intelligence.
- Clark Gregg previously worked with Tim DeKay, Blair Underwood and Constance Zimmer in The New Adventures of Old Christine.
- Clark Gregg previously worked with Scarlett Johansson in In Good Company.
- Clark Gregg previously worked with Brie Larson in Hoot.
- Clark Gregg previously worked with Anthony Hopkins in The Human Stain.
- Clark Gregg previously worked with Sam Rockwell in Choke and again in Trust Me.
- Clark Gregg later worked with Titus Welliver in Live By Night.
- Clark Gregg is one of the actors to portray characters for both Marvel Studios and Lucasfilm, both of which are owned by Walt Disney Pictures. He portrayed Dickinson in The Young Indiana Jones Chronicles.
- Clark Gregg is the first actor in the Marvel Cinematic Universe that appears as the main cast of a television series Agents of S.H.I.E.L.D. who previously appeared in films Iron Man, Iron Man 2, Thor and The Avengers.
- He won a Saturn Award for Best Supporting Actor for his work on The Avengers.