Christopher Markus (born October 16, 1969) and Stephen McFeely (born February 24, 1970) are 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.