Tess Daly and Claudia Winkleman host an all-star Christmas special. With music from Jamie Cullum and Gary Barlow.
| Name | Type | Role | |
|---|---|---|---|
| Gary Barlow | Musical Guest | ||
| Sheridan Smith | Musical Guest | ||
| Jamie Cullum | Musical Guest | ||
| Anne-Marie | Guest Star | ||
| Moira Stuart | Guest Star | ||
| Jay Blades | Guest Star | ||
| Adrian Chiles | Guest Star | ||
| Fred Sirieix | Guest Star | ||
| Mel Giedroyc | Guest Star |