Mirrorpix / MEGA While Prince George is only 12, the young royal is reportedly "undoubtedly aware" of his future as the next Prince of Wales and, ultimately, King of England. Historian Marlene Koenig told Us Weekly that Prince William and Kate Middleton have prepared the youngster for the "changes" that are inevitable with his future. George was able to serve as a trainbearer during King Charles III' coronation, and the historic moment was special for the Wales brood. "George is the first member of the Royal Family to have such a role in the service," Koenig said.