Christopher Markus and Stephen McFeely

Christopher Markus (born October 16, 1969) and Stephen McFeely (born February 24, 1970) are American screenwriters and producers. McFeely and Markus are 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 $12.3 billion. However, in overall metrics, they are the highest grossing screenwriters altogether in terms of worldwide box office with the total gross of $95.8 billion.

They gained worldwide recognition for their works that include ''The Chronicles of Narnia'' film franchise and the Marvel Cinematic Universe (MCU), having written the first three ''Captain America'' films (''The First Avenger'', ''The Winter Soldier'' and ''Civil War''), in addition to ''Thor: The Dark World'', ''Avengers: Infinity War'', and ''Avengers: Endgame'', which is currently the second highest-grossing film of all time unadjusted for inflation. They also created ABC's ''Agent Carter'' TV series, set in the MCU. Provided by Wikipedia