Pope Leo XIV appointed Bishop Brendan Cahill as the new bishop of Joliet, Illinois, the apostolic nuncio to the United States announced on Thursday, September 17.

Bishop Cahill’s appointment fills the vacancy created when Archbishop Ronald Hicks was appointed archbishop of New York in December 2025.

Born in Florida and raised mostly in Texas, Bishop Cahill was ordained a priest of the Archdiocese of Galveston-Houston on May 19, 1990, according to his biography on the Diocese of Joliet’s website. He then spent time in Rome and received a doctorate in fundamental theology from the Pontifical Gregorian University in 1999.