When Harry celebrated his 40th birthday in September, however, King Charles and Prince William both acknowledged his day with a social media tributes. Middleton even celebrated brother-in-law's milestone day with a phone call, a source told Express.

Royal fans may recall that last year when King Charles turned 75, it was reported that Harry reached out to his father via a video call and had his children sing “Happy Birthday

The chances of a festive reunion between King Charles and Prince Harry has been cast in doubt, as the Duke of Sussex and wife Meghan remain distant from the Royal Family. Despite some brief visits to London by Harry this year following the news of his father's cancer diagnosis,