Despite the heavy subject matter, Paul Mescal and Josh O'Connor developed a 'very light and boyish' atmosphere on the set of 'The History of Sound,' with the Oscar nominee revealing the two costars ate 'eight Jolly Ranchers a day.

In this period drama, premiering at Cannes, two of Hollywood's buzziest male actors play lovers making music together – but the film could do with far more passion and urgency.

The historical drama, from 'Living' and 'Moffie' director Oliver Hermanus, premiered in competition in Cannes Wednesday night.