Captain America: The Winter Soldier duo Chris Evans and Scarlett Johansson contributed to script

Marvel's Captain America: The Winter Soldier hits Blu-ray and DVD on Monday, and it has been revealed that Chris Evans and Scarlett Johansson who star as Captain America and Black Widow respectively contributed to the script.

Talking to Metro, Scriptwriter Stephen McFeely said that he didn't mind the stars adding dialogue, because they know their character's voices better than he does explaining "The script was in pretty good shape when we started, but Chris had a lot of input on the scene where he's meeting Sam Wilson for the first time, and what it would take to make Captain America - who probably gets stopped in the street all the time - turn around for that extra conversation, and then he and Scarlett were involved in that scene in the car when they're driving to Camp Lehigh and they're talking about kissing and all that.

I think actors very often know their voices better than I do, so I have no problem with them adding a couple of lines to a scene or telling a different joke.

It's only when they want to take a scene and make it about something else that it gets problematic. As long as we get what we're trying to accomplish then I don't care."

Captain America: The Winter Soldier features Emily VanCamp, Samuel L. Jackson, Cobie Smulders, Robert Redford, Hayley Atwell, Sebastian Stan, Anthony Mackie, Toby Jones, Frank Grillo, Dominic Cooper, Alan Dale and Jenny Agutter and will be available to own from Monday 18th August.

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CAPTAIN AMERICA: THE WINTER SOLDIER HITS BLU-RAY AND DVD ON MONDAY 18TH AUGUST