"They had not received any invitation and were unaware of any celebrations until the stories came out," an insider revealed to MailOnline. "I'm sure the Duke will find a way to reach out privately to wish His Majesty a happy birthday, as he has always done."
The ongoing strain in the relationship between King Charles and Prince Harry was further exacerbated following the release of Harry's memoir, "Spare." In the book, the Duke candidly shared accounts of their strained relationship, including instances where his father made "unfunny jokes" about his paternity and referred to Camilla as an "evil stepmother." These revelations reportedly led to the Sussexes' eviction from their residence at Frogmore Cottage.
Despite these tensions, Prince Harry's commitment to maintaining a private line of communication with King Charles highlights his desire to foster a sense of unity within the family, especially on significant occasions like his father's milestone birthday.