One reason that I am posting this is that every year I forget to switch from the Angelus to the Regina Coeli until we are two or three weeks into the Easter season. This way I'll be sure to remember.
Queen of Heaven Rejoice, Alleluia.
For He Whom thou didst merit to bear, Alleluia.
Has risen as he said, Alleluia.
Pray for us to God, Alleluia.
Rejoice and be glad, O, Virgin Mary, Alleluia
Because the Lord is truly risen, Alleluia.
Let us pray,
O God, Who through the Resurrection of Thy Son, our Lord Jesus Christ, has vouchsafed to make glad the whole world, grant we beseech Thee, that through the intercession of the Virgin Mary, his Mother, we may attain to the joys of eternal life. Through this same Christ our Lord. Amen.
This is the way I say it. Apparently, nobody on the internet says it exactly the same way as I do, but then, everybody seems to have a slightly different translation. So, to be entirely accurate, I will give you the original version.
Regina coeli, laetare, alleluia: Quia quem meruisti portare, alleluia.
Resurrexit sicut dixit, alleluia. Ora pro nobis Deum, alleluia.
V. Gaude et laetare, Virgo Maria, Alleluia,
R. Quia surrexit Dominus vere, alleluia.
Oremus: Deus qui per resurrectionem Filii tui, Domini nostri Iesu Christi, mundum laetificare dignatus es: praesta, quaesumus, ut per eius Genetricem Virginem Mariam, perpetuae capiamus gaudia vitae. Per eundem Christum dominum nostrum.
And if you want to learn how to chant it, you can do so here.
Thanks to Craig for finding these chants.