"What Child Is This?" is a Christmas carol with lyrics written by William Chatterton Dix in 1865. The melody is based on the English folk song "Greensleeves". The carol describes the scene of the baby Jesus sleeping on Marys lap while angels sing and shepherds watch over him. The chorus of the carol goes:

This, this is Christ the King, Whom shepherds guard and angels sing; Haste, haste, to bring Him laud, The Babe, the Son of Mary.

The carol also reflects on the significance of Jesus birth, with lines such as "The silent Word is pleading" and "The King of kings salvation brings". The carol has been covered by many artists and is a popular Christmas song.