The Duke and Duchess of Cambridge are very pleased to share two photographs of Princess Charlotte and Prince Louis, taken by The Duchess at Kensington Palace.— Kensington Palace (@KensingtonRoyal) May 5, 2018
This image was taken on 2nd May, on Princess Charlotte’s third Birthday. pic.twitter.com/H5VVgIwRGp
They shared photos of the newborn and Charlotte on the latter's third birthday.
This image of Prince Louis was taken by The Duchess of Cambridge at Kensington Palace on 26th April.— Kensington Palace (@KensingtonRoyal) May 5, 2018
The Duke and Duchess would like to thank members of the public for their kind messages following the birth of Prince Louis, and for Princess Charlotte’s third birthday. pic.twitter.com/bjxhZhvbXN
This one was taken of Louis three days after he was born.
Sources 1 and 2