Robert Redford has explained why he signed up for Captain America: The Winter Soldier.
He will play the role of Alexander Pierce, a senior leader at S.H.I.E.L.D. and in an interview with Entertainmant Weekly, he explained his decision.
He said: "One of the reasons that I did it was I wanted to experience this new form of filmmaking that's taken over where you have kind of cartoon characters brought to life through high technology.
"The Avengers series is a product of high technology playing a major role in the new order of filmmaking so I wanted to experience that - I just wanted to know what that was like and I had that opportunity, so for me it was like stepping into new terrain just to experience what it was like."
Redford will star alongside Chris Evans who will reprise his role as Captain America as will Scarlett Johansson, Sebastian Stan, Cobie Smulders, Hayley Atwell and Samuel L Jackson.