Simon David Kinberg is a British-born American filmmaker. He wrote or produced a number of films in the 20th Century Fox X-Men film franchise, and has also written such films as Mr. & Mrs. Smith and Sherlock Holmes. He has served as a producer on others, including Cinderella and The Martian, the latter of which was nominated for the Academy Award for Best Picture. His production company Genre Films had a first-look deal with 20th Century Fox. Kinberg made his directorial debut in the 2019 X-Men film Dark Phoenix from a script he also wrote.

Mr. & Mrs. Smith is a 2005 American action comedy film directed by Doug Liman and written by Simon Kinberg. The film stars Brad Pitt and Angelina Jolie as a bored upper middle class married couple, who each are surprised to learn that the other is also an assassin, belonging to competing agencies and that they have been assigned to kill each other. Besides being a box office success, Mr. & Mrs. Smith also established Pitt and Jolie's personal relationship.