Some have watched it in the cinema,” one cleric involved said, adding that the movie accurately portrays how the conclave works.

Catholic cardinals gather and sequester themselves in the Vatican for the start of a conclave to elect a new pope.

The Vatican will be on lockdown starting Wednesday. The secrecy surrounding the conclave is to protect the cardinals from any outside influence that might impact the way they vote. The cardinals must surrender their phones and the Vatican's cell phone towers will be deactivated.