This is the Marian Antiphon for Compline during the seasons of Easter. It is used from Easter Sunday until Pentecost.
Regina caeli, lætare, alleluia.
Quia Quem meruisti portare, alleluia.
Resurrexit, sicut dixit, alleluia.
Ora pro nobis Deum, alleluia.
℣ Gaude et lætare, Virgo Maria, alleluia.
℟ Quia surrexit Dominus vere, alleluia.
This text has been translated as Fr. Caswall’s “Joy to Thee, O Queen of Heaven ! Alleluia.” The hymn “Be Joyful Mary Heavenly Queen” is translated from a German hymn paraphrasing this antiphon as well.