The Salve Regina, also known as the Hail Holy Queen, is a Marian hymn and one of four Marian antiphons sung at different seasons within the Christian liturgical calendar of the Roman Catholic Church.

The Salve Regina is traditionally sung at Compline in the time from the Saturday before Trinity Sunday until the Friday before the first Sunday of Advent. The Hail Holy Queen is also the final prayer of the Rosary.