Last week during Prince Louis' christening ceremony at the Chapel Royal at St. James's Chapel, the three-year-old princess was spotted wearing a blue dress with blue shoes and a blue headband on her loosened hair.
Holyoak took the photographs in the Morning Room and the garden at Clarence House - the residence of Prince Charles and Camilla - following the baptism.
That said, photographer Matt Holyoak did include a hidden tribute to the British monarch in Louis's official christening photots.
Another picture has been released of Prince Louis by the Duke and Duchess of Cambridge, showing him in a much more informal way. Standing around her are Prince Harry and his new bride Meghan Markle, William and Harry's father Prince Charles, Charles' wife Camilla and other members of the royal family. The royal mother of three also sported McQueen [her wedding designer] for the christenings of Prince George and Princess Charlotte. Kate's younger sister, Pippa Middleton, is pregnant with her first child with her husband, James Matthews. The Queen and Prince Philip were notably absent, having made the decision not to attend the christening, according to the UK's Press Association.
LOOK: Royals mark Prince Louis’ christening
Prince Louis was born 23 April 2018, the day of the heavenly patron of his elder brother Prince George.
Mr Porteous also took images of Prince George in 2016 to mark his third birthday, including one in which the youngster held an ice cream under the nose of family dog Lupo.
Until now Prince Louis has been the more subdued youngster in the royal family - give him a break, he's only two months old!
The youngster's full name is George Alexander Louis, but his full title is His Royal Highness Prince George of Cambridge, though he is often referred to as Prince George of Cambridge.More news: British Prime Minister wins key Brexit vote despite ongoing rebellion