Photo Credit: Matt Holyoak

He is the cutest!

Prince William and Kate Middleton baptized son Louis at St. James' Palace last Monday, and now the royals are releasing some of the sweet photographs from the little one's big milestone day for the public's enjoyment.

In one, the tiny heir has a huge smile on his face as he's being held in his mother's arms. In another, he gazes up at Kate while laying peacefully in his ceremony gown.

"Their Royal Highnesses hope that everyone enjoys this lovely photograph of Prince Louis as much as they do,” Kensington Palace said in a statement on Monday.

The Duchess of Cambridge went all out for her look, donning an Alexander McQueen dress with a Jane Taylor headpiece.

They also shared a snapshot of their entire family after the event, and not only was the entire Middleton fam in attendance, but Prince Harry's new bride Meghan Markle was there beaming and blending right into the fold.

Prince George and Princess Charlotte seem to be adjusting well to another sibling!