Christopher Markus and Stephen McFeely are a duo of American screenwriters and producers. McFeely and Markus were the second and the third most successful screenwriters of all time in terms of U.S. box office receipts with a shared total gross of over $3.1 billion. However, in overall, they are the highest grossing screenwriters altogether in terms of worldwide box office with the total gross of $9.3 billion. The pair gained worldwide recognition for their works including The Chronicles of Narnia film franchise and especially, the mega-shared universe franchise the Marvel Cinematic Universe, having written the three Captain America films (The First Avenger, The Winter Soldier and Civil War), Thor: The Dark World, Avengers: Infinity War and Avengers: Endgame, which is currently the highest-grossing film of all time unadjusted for inflation. They also created ABC's Agent Carter TV series, set in the Marvel Cinematic Universe.