A royal first meeting!

After the birth of his little sister, Princess Charlotte, Kate Middleton and Prince William's 21-month-old son, Prince George, couldn't wait to be introduced to the newest member of their family.

"George was very excited to meet his sister. George was aware that he would soon have a new brother or sister and has been excited throughout the pregnancy,” a family friend revealed in a new report.

princess charlotte

William, Kate and baby Charlotte on May 2, 2015.

In the hours following Charlotte's arrival on Saturday, May 2, William, 32, left London's St. Mary's Hospital to fetch George from Kensington Palace, where he was reportedly being cared for by Kate's mother, Carole Middleton.

Related: The Royal Baby — See the Best Photos of Kate Middleton and Prince William's Daughter, Princess Charlotte!

As they arrived at the Lindo Wing, George — clad in an adorable blue sweater with matching shorts and socks — could be seen waving to the throngs of fans and photographers waiting outside the hospital for a glimpse of the royal baby.

“He might have been a little shy around the new baby, but I heard everything went well. He’s great around other children. He’s a very curious boy," the insider added.

prince george and prince william

George and William outside the Lindo Wing on May 2, 2015.

Since the couple left the hospital with their newborn daughter over the weekend, Kate, 33, and her husband have been visited by several members of the royal family, including Carole and Michael Middleton, Pippa Middleton, Prince Charles and Camilla Parker Bowles.

During the visit, Charles, 66, was reportedly "over the moon" about meeting his granddaughter. "He’s a very proud man at the moment. He was convinced all along that it would be a girl," the source told 'Us Weekly.'