Reddy's film career included a starring role in Walt Disney's "Pete's Dragon", introducing the Oscar-nominated song "Candle on the Water" and the role of a nun in "Airport 1975", singing her own composition "Best Friend". For her part in "Airport 1975", Reddy was nominated for a Golden Globe for Most Promising Newcomer – Female. Reddy was one of many musical stars featured in the all-star chorale in the film "Sgt. Pepper's Lonely Hearts Club Band" (1978), and she later played cameo roles in the films "Disorderlies" (1987) and "The Perfect Host" (2010).