The Prince of Wales told Princess Kate "George, Charlotte, Louis and I are so proud of you" in a heartfelt birthday message.

Future King George, 11, joined Prince William and Princess Kate during three tours while his younger sister, 9, came along for two of them ... George was approaching his first birthday that July and ...

Kate, who was born Jan. 9, 1982, is expected to spend her birthday privately with William ... royal family in May at Trooping the Colour. Prince George of Wales, Prince William, Prince of Wales ...

L-R: Princess Charlotte, 9, Prince Louis ... and raced each other in yachts. George was approaching his first birthday that July and got a rapturous welcome from fans in the two countries.