Kate Middleton shared a photo of her eldest child, Prince George, to commemorate his 11th birthday on Monday, July 22, and royal watchers couldn’t help but notice the resemblance between the youngster and Prince William. “Wishing Prince George a very happy 11th birthday today,” Kate captioned the Instagram post. “Prince George looks so much like his Dad,” one follower penned. “He’s the spitting image of his father, honestly,” another added. Royal fans often praise George and William’s bond, as the future Prince of Wales usually mirrors his dad’s mannerisms. OK! previously reported royal biogra…