Queen of Heaven, rejoice, alleluia.
For He whom you did merit to bear, alleluia.
Has risen, as He said, alleluia.
Pray for us to God, alleluia.
V. Rejoice and be glad, O Virgin Mary, alleluia.
R. For the Lord has truly risen, alleluia.
Let us pray. O God, who gave joy to the world through the resurrection of Thy Son, our Lord Jesus Christ, grant we beseech Thee, that through the intercession of the Virgin Mary, His Mother, we may obtain the joys of everlasting life. Through the same Christ our Lord. Amen.
The Regina Caeli is sung or recited in place of the Angelus during the Easter season, from Holy Saturday through Pentecost Sunday. (Source)
The authorship of the "Regina Coeli" being unknown, legend says the St. Gregory the Great (d. 604) heard the first three lines chanted by angels on a certain Easter morning in Rome while he walked barefoot in a great religious procession and that the saint thereupon added the fourth line: "Ora pro nobis Deum. Alleluia." (See also SALVE REGINA for a similar attribution of authorship). The authorship has also been ascribed to Gregory V, but without good reason. (Source)
Mary, Mother of Jesus Christ, Eternal High Priest, Mother of all priests, and our Mother, help us respond generously to the Holy Spirit's request, through the voice of His Church, to offer up to God Eucharistic adoration for priests. Amen.