Social media users posted a picture of a beaming Louis with the message, “Happy 6th Birthday, Prince Louis! I appreciate all of your kind wishes for me today.
When Princess Charlotte turns one in May, the same procedure—which differs from the custom of releasing the images to the media ahead of time under embargo—is anticipated to be carried out.
The family is going through an extraordinary period of time, which is thought to be the cause of the process shift.
The King and Kate’s cancer diagnoses have made the last few months somewhat hectic for the family.
In March, the Princess of Wales declared that she was receiving prophylactic chemotherapy.