King Charles and Prince William will appear together at Westminster Abbey on Friday, according to British media reports.
According to reports, William will be installed as the Ancient Order's Great Master in a special ceremony at Westminster Abbey.
After over five decades in the job, the king turned it over to his son on St. George's Day last year.
According to the story, the king is participating in the service for the first time as the sovereign of the order, which is bestowed to members of the military or civil service for outstanding service and is celebrating its 300th anniversary this year.
The father-son combination, dressed in red satin robes, will proceed through the cathedral with officers, knights, and the order's Dame Grand Cross before taking their places in the Quire.
Charles, who is still undergoing cancer treatment, will appear alongside William, only days after his youngest son, Prince Harry, revealed in a stunning interview with the BBC that his father will not talk to him.
The Duke of Sussex also stated that he want to reconcile with his family because he does not know how much time his father has left.