Callum Turner and Monica Barbaro share some pizza with ET's Emily Curl while chatting about their new movie, 'One Night Only,' before it hits theaters on Aug. 7. The rom-com stars share the necessary ingredients to any happy relationship, and explain the hilarious way one, real New York City rat made its way into their film. Plus, Callum describes how he became an expert pizza chef while making this movie, while Monica reveals which scene caused her to (silently) cry in her trailer before shooting.
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