Prince Charles was reportedly upset over his lack of involvement in Prince George's 2017 birthday preparations.

The preparations were primarily carried out by Kate Middleton's parents, Carole and Michael Middleton.

Charles did very little in the planning of the party.

According to an insider, Charles and Camilla were invited to the event.

Carole Middleton orchestrated the entire event.

Charles attended the event, but Camilla did not because of other commitments.

Charles was discussing a rural protection campaign with Emma Bridgewater at the time of the event.

Charles did not want to miss his grandson's birthday.

The fact that the event was primarily a Middleton event orchestrated by Carole upset Charles.