Coaches will.i.am, Sir Tom Jones, LeAnn Rimes and Tom Fletcher and Danny Jones from McFly take their teams to the toughest round of the competition: the Callbacks.
| Name | Type | Role | |
|---|---|---|---|
| Emma Willis | Host | ||
| Hannah Waddingham | Guest Star | ||
| Perrie | Guest Star | ||
| Griff | Guest Star |