Andrew Apostoli is a Catholic priest and a member of the Redemptorist congregation. He is known for his work as a historian and biographer, particularly on Mother Angelica, founder of EWTN, and other topics related to the Catholic faith. He has written several books, including "Fatima for Today" and "Answering the Call: The Story of Mother Angelica". Apostoli has been a popular speaker and a prominent figure at Catholic events, sharing his knowledge on Marian topics and lives of saints.