Marcello Semeraro is an Italian prelate of the Catholic Church who has been the Prefect of the Congregation for the Causes of Saints since October 2020. He was previously Bishop of Albano and secretary to the group of cardinals named by Pope Francis to advise him.

The Diocese of Albano is a Latin suburbicarian see of the Diocese of Rome in Italy, comprising seven towns in the Province of Rome. Albano Laziale is situated on the Appian Way some 15 kilometers from Rome.