Birthday girl Princess Charlotte got a sweet message from her aunt and uncle on Thursday (May 2). The Princess of Cambridge is four years old now, and Duchess Meghan and Prince Harry posted a lovely comment on a Kensington Palace Instagram post featuring Duchess Kate’s latest portraits of her daughter.

“Happy Birthday Charlotte!” they wrote, dropping in birthday cake and red balloon emojis. “Lots of love, H and M xo.”

Harry and Meghan left a similar message on Prince Louis’s latest portraits. Photo; © Instagram/@KensingtonRoyal

Meghan and Harry are still awaiting the arrival of Baby Sussex, who is due any day now. We bet Charlotte and her brothers George and Louis can’t wait to have a new cousin! The royal baby surely has many fun playtimes to look forward to over the next few years.

Charlotte looks so confident in this photo, one of her newest birthday portraits taken by Kate! Photo: © The Duchess of Cambridge/PA

MORE: Duchess Kate and Prince William release sweet new photos for Princess Charlotte’s birthday

On Thursday, Prince William cheekily revealed his daughter has big plans for a “rowdy party” to celebrate her birthday with her friends! William’s comment came after Charlotte’s latest portraits were released ahead of her birthday. The series of images was taken in April at Kensington Palace and the family’s country home at Anmer Hall in Norfolk. Kate also took a very sweet set of pictures of Louis during their stay to mark his special day! In the pictures, Charlotte can be seen grinning and running, smiling for the camera and looking very confident and happy.