Walter Norris Kirn is an American novelist, literary critic, and essayist. He is the author of eight books, most notably Up in the Air, which was made into a film of the same name starring George Clooney.

Jason R. Reitman is a Canadian–American filmmaker. He is best known for directing the films Thank You for Smoking (2005), Juno (2007), Up in the Air (2009), Young Adult (2011) and Ghostbusters: Afterlife (2021). He has received one Grammy Award, one Golden Globe and four Academy Award nominations, two of which are for Best Director. Reitman is a dual citizen of Canada and the United States. He is the son of director Ivan Reitman, and known for frequently collaborating with screenwriter Diablo Cody.