 In the late 1980s he was nominated with George Miller and Terry Hayes on three separate occasions in the AACTA Award for Best Film category at the Australian Film Institute Awards.In 1987 they won best film for "The Year My Voice Broke", were nominated in 1989 for "Dead Calm" and won a second award for "Flirting" in 1990.In 1995 Mitchell was nominated for an Academy Award with George Miller and his brother Bill Miller in the Academy Award for Best Picture category for the film "Babe".