Stormzy will recite a passage from Luke’s Gospel as Christmas Day draws to a close on BBC One.
The 26-year-old - who has discussed and rapped about his faith on numerous occasions - will tell the story of the “first ever Christmas when angels appeared to shepherds to proclaim the news of the birth of Jesus”, the BBC said.
A short preview of Stormzy's reading has been shared on Twitter.
In the clip, the rapper wears a white hoodie and recites the lines.
Libera, an all-boys choir, will perform the Basque carol Sing Lullaby in the programme.
The choir features singers aged between seven and 16 who attend local schools in South London.
The special television event marks the end of a standout year for Stormzy, who is currently celebrating the release of his second album, Heavy Is The Head, which received overwhelming positive reviews earlier this month.
In June, he became the first black British solo artist to headline Glastonbury and while his performance was a triumph, Stormzy later revealed sound problems left him thinking he had failed to impress.
Explaining that his in-ear piece "blew" around 20 minutes into his set, the rapper told Q Magazine: "So I had no sound for the whole thing. It was the most difficult thing I’ve ever done.
"When I walked offstage, I thought I’d f***** it. I thought it was the worst thing I’d ever done. I came offstage and thought I’d totally, absolutely blown it. I was crying for, like, an hour. I was in hysterics."
