Jason Reitman. Producer: Up in the Air. Jason Reitman is a Canadian filmmaker and producer who notably directed Ghostbusters: Afterlife, Juno, Thank You for Smoking, Up in the Air, Young Adult and Tully. He produced Chloe and Jennifer's Body, two films that advanced Amanda Seyfried's career for adult oriented roles. He is the son of Ivan Reitman, who directed the first two Ghostbusters films and Twins.