Prince Louis's first official portraits have arrived! Just a week after his exciting debut on April 23 [1], new mum the Duchess of Cambridge shared more sweet photos of her baby boy [2] taken on Princess Charlotte's third birthday [3] at Kensington Palace. In one snap, big sister Charlotte plants a kiss on her brother's forehead, and, yes, our hearts are melting. In the other photo, Louis stares off into the distance with a serious look on his face, closely resembling his proud father, Prince William [4].

Continuing with tradition [5], Kate was behind the lens to capture the adorable moment between the new royal and his sibling [6]. The portraits mark the first time Kate and William's children have been seen together. William took George and Charlotte to meet Louis [7] shortly after his birth at St. Mary's Hospital in London, but the toddlers were back at home before the royal couple posed for photos [8] with their newborn outside the Lindo Wing.

The next major event for the royal family is Prince Harry and Meghan Markle's wedding [9], set for May 19. Although Louis won't be there [10], we can expect to see photos of George and his sister Charlotte stealing hearts as a pageboy and bridesmaid [11], respectively. Keep reading to see more cuteness from Louis's first official portraits, then check out our roundup of Charlotte's deliciously adorable portraits [12] over the years.