Since the introduction of the MPAA rating system in 1968, only one film rated 'G' (General Audiences) has ever won Best Picture. That film was 'Oliver!', the 1968 musical adaptation of Charles Dickens' 'Oliver Twist.' While many family-friendly films like 'Mary Poppins' or 'The Sound of Music' were released before the rating system or won other awards, 'Oliver!' stands alone in the G-rated category. On the flip side, 'Midnight Cowboy' (1969) is the only X-rated film to ever win Best Picture (though its rating was later changed to R). This highlights a long-standing trend where the Academy tends to favor more mature, adult-oriented dramas for its highest honor, making the win for the whimsical musical 'Oliver!' a true statistical anomaly.