The event, which will air on Christmas Eve on ITV, was filmed at Westminster Abbey and features the likes of Ellie Golding, Leona Lewis and Kate Garraway.

       But some have accused the royal couple of staging photos during the event.

       Twitter user @Cromwell606 said one photo looked "rehearsed".

       And @ATaylorSaunders agreed, saying: "It is rehearsed anyway."

       Meanwhile, user @Lost_In_Films_ said: "So she does stop grinning, she's either not getting her own way or reminding him who's boss"

       But others were quick to defend the Duke and Duchess, with user @montanabrit66 saying: "How can it be rehearsed that they knew exactly when the camera was going to be on them. Come on use your brain and be realistic."

       Additional reporting by Francesca Edwards and Chloe Davies