O Come, All Ye Faithful is a popular Christmas carol. The music of "O come all ye faithful" is based on the carol Adeste Fideles, which is thought to have originated in Portugal. John Francis Wade is likely to be the author of the Englisch lyrics of "O Come, All Ye Faithful”. The first publication of "O come all ye faithful" appears to have been made in the mid 18th century. Here is the first stanza of "O come all ye faithful":

O come all ye faithful
Joyful and triumphant
O come ye, o come ye to Bethlehem
Come and behold him
Born the King of Angels
O come let us adore him
O come let us adore him
O come let us adore him
Christ the Lord

Below you can find our "O come all ye faithful" sheet music.