In a documentary made in honor of Queen Elizabeth II's 90th birthday on Thursday, Elizabeth at 90: A Family Tribute, Prince William and Prince Harry get quite a kick out of watching some never-before-seen footage of their father, Prince Charles, romping around in the yard as a young boy. Dressed in an adorable playsuit and little leather shoes, Charles struts across the lawn to his mother while she tends to his sister, Princess Anne, in her pram. "He walks like George! Or, George walks like him," Harry says with a laugh while sitting side-by-side with William, who clearly agrees, adding, "It's a purposeful walk."
In addition to the documentary, the Queen has been honored with a collection of postage stamps featuring her, Charles, William, and George, and will be ringing in her 90th year with a number of massive celebrations. Check out William and Harry's video above, and see the lovely portrait Queen Elizabeth took with her grandchildren and great-grandchildren.