Kate Mara ("Transsiberian," "Zoom") and Clark Gregg ("500 Days of Summer") have joined Marvel's currently filming "Iron Man" sequel says The Hollywood Reporter.
Gregg is returning as Agent Phil Coulson of S.H.I.E.L.D. while Mara's role is being kept under wraps.
Jon Favreau is presently shooting the action feature over at Manhattan Beach in California.
