It's a doubly important day for royal fans today, as not only has King Charles officially been crowned the reigning monarch, but young Prince Archie is also celebrating his fourth birthday.
His father, Prince Harry, attended the ceremony at Westminster Abbey today in London but left promptly after to head back to his family.
Meanwhile, Archie was at home with mum Meghan Markle and his younger sister Princess Lilibet in California.
It's been reported that the Duchess of Sussex planned a small birthday party to mark her son turning four at their Montecito mansion, with her mother and a group of friends.
But it seems many more want to celebrate the youngster's birthday, as well wishes have been pouring in from fans on social media.
One person tweeted: "Happy fourth birthday to cute little Prince Archie."
Another posted: "The happiest birthday to Prince Archie, the joyous and cutest Prince."
Someone else wrote: "Happy 4th Birthday to Prince Harry and Meghan's son, Prince Archie of Sussex! Sending love to the Sussexes today."
While a different user said: "Wishing the happiest of birthdays to our sweet Prince Archie!"
Others shared photos of Archie and his parents as well as video clips and montages they'd made from clips taken from the Netflix documentary.
Despite the public celebrating Archie's special day, members of the Royal Family are seemingly yet to acknowledge it - though, they have had quite a lot going on.
Meghan and Harry also have yet to post anything on their official social media accounts to mark the occasion.
Usually, members of the Royal Family send birthday wishes to Archie but none have been seen so far today - even from Harry and Meghan themselves.
Relations between the Duke of Sussex and the rest of the Royal Family are at an all-time low, but they still normally post a message and photo on their social media channels.
However, there was some discomfort felt by officials at the palace last year, according to the Mail, because they didn't have an up-to-date picture of Archie to accompany his birthday messages on social media.
Instead, they had to use photos from just after he was born or from his official christening.
