Prince George's christening photos were taken by Jason Bell on October 23, 2013 in the Morning Room at Clarence House.
Kate was quoted as saying Louis was "very relaxed and peaceful" during his christening at St. James' Palace in London.
The Queen and Prince Philip did not attend Louis's christening, likely due to this week's busy schedule of events, and so they are not in the portraits.
However, as with many royal family photos, there are some hidden details you probably missed when first taking a look at the photographs.
First two of Thai soccer team rescued from cave
The mission was only launched on Sunday morning because floodwaters inside the cave were at their lowest level in days. The entire operation could take up to four days, but the initial success raised hopes about the rescue mission.
The photographs have been released by the Duke and Duchess of Cambridge to mark the milestone. The archbishop of Canterbury, the Most Rev. Justin Welby, who also officiated the May nuptials of Prince Harry and Meghan, Duchess of Sussex, performed the ceremony.
'Everyone was so relaxed and in such good spirits, it was an absolute pleasure.
"I only hope I have captured some of that joy in my photographs". Prince Louis is the third child of Prince William and wife Kate.
The Duchess of Cambridge looked every inch the proud mum as she left Prince Louis' christening with her infant son cradled in her arms. Holyoak has previously worked with the royals in the past and photographed the portraits of Queen Elizabeth II and Prince Philip for their 70th wedding anniversary in 2017.
The Cambridges are now a family of five.
According to tradition, he was baptised with water from River Jordan, and wore the same christening gown used by his siblings Prince George, four, and Princess Charlotte, three.