Jason R. Reitman ( /ˈraɪtmən/; born October 19, 1977) is a Canadian and 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), Ghostbusters: Afterlife (2021), and Saturday Night (2024). He has received one Grammy Award, one Golden Globe and four Academy Award nominations, two for Best Director. He is the son of director Ivan Reitman. He is known for frequently collaborating with screenwriter Diablo Cody and director Gil Kenan.