Jason Reitman Opens Up About Late Dad Ivan Reitman's 'Ghostbusters' Legacy (Exclusive)

'Ghostbusters: Frozen Empire' writer and producer, Ivan Reitman, explains to ET's Rachel Smith how the latest installment honors his late father, Ivan Reitman, who directed the original 'Ghostbusters' film 40 years prior. 'Ghostbusters: Frozen Empire' is in theaters March 22.