which he was offered , and instead worked on short films to gain clout . Ivan and Jason Reitman are the father / son tandem behind award darling ` ` Up in the Air '' The father , Ivan was the producer behind ` ` Ghostbusters '' and ` ` Animal Farm '' The son , Jason showed up on sets and directed ` ` Thank You for Smoking '' and ` ` ' '' ` ` Up in the Air '' is the first film the pair has worked on together .
Ivan and Jason Reitman are the father / son tandem behind award darling ` ` Up in the Air '' The father , Ivan was the producer behind ` ` Ghostbusters '' and ` ` Animal Farm '' The son , Jason showed up on sets and directed ` ` Thank You for Smoking '' and ` ` ' '' ` ` Up in the Air '' is the first film the pair has worked on together .