Dancing in his seat, pulling funny faces, and cheekily blowing a raspberry at his mother - Prince Louis won over a lot of fans during the Platinum Jubilee.
Once again, the five-year-old royal left people delighted as he displayed a series of exuberant expressions during King Charles' Coronation.
For many, his actions have been a refreshing reminder that even royal children are immune to the pomp and pageantry surrounding them.
On Twitter, one fan joked: "I’m only here for Prince Louis facial expressions."
Another added: "I wish the camera would show more of Prince Louis, his facial expressions make this family."
A third admitted: "I'm waiting for #PrinceLouis to do something silly."
"I am impressed by how well Prince George, Princess Charlotte, and Prince Louis are behaving during this lengthy ceremony," admitted another.
William and Kate are sitting in the front row at the abbey for the historic ceremony, with their children Prince George and Princess Charlotte.
Prince Louis, who recently turned five, took his seat next to his mother after processing through the abbey and did not retire as the service began, as had been expected.
Last year, royal fans were left in stitches at his reactions to the flypast - where he stole the show.
He was seen jumping with glee at the incredible display before covering his ears as the noisy planes roared overhead during the event that kicked off four days of celebration for the Queen's Platinum Jubilee.
He then waved up at the planes, before turning to his great-grandmother to ask a question.
His mother appeared to attempt to calm him down with a few calming words, as the Queen looked on adoringly at her great-grandson.
"Prince Louis is stealing the show," raved one fan. "Prince Louis screaming crying at the planes being too loud will undoubtedly be my favourite Jubilee moment," commented another.
The five-year-old tried to cover his mum's mouth before blowing raspberries in an animated display during the Sunday pageant.
Kate Middleton, 41, was seen keeping a close eye on her youngest son - who upturned his nose with his thumb at her after growing restless.
On the last day of the celebrations, he was captured with a wide range of facial expressions before cheekily shushing his mum.
