Royal kids coordinating outfits

Princess Beatrice and Princess Eugenie - Princess Beatrice accompanies her sister, Princess Eugenie, on her first day at Upton House School in Windsor, England, in 1994.

Prince William and Prince Harry - The Prince and Princess of Wales pose for a picture with their kids, with the adorable Prince William and Prince Harry wearing white and blue.

Princess Leonor and Princess Sofia - King Felipe VI and Queen Letizia of Spain pose with their children, Princess Leonor and Princess Sofia, on December 10, 2018 in Madrid.

Princess Beatrice and Princess Eugenie - The two sisters attend the Christmas pantomime 'Cinderella' in aid of Children in Crisis, of which their mother is a patron.

Queen Elizabeth II and Princess Margaret - The then-Princess Elizabeth and Princess Margaret pose for a photo in matching outfits at Buckingham Palace in 1942.

Princess Beatrice and Princess Eugenie - The sisters do it again. This time, at the Theatre Royal in Drury Lane, London, in 1998.

Prince William and Prince Harry - Prince William accompanies his little brother on his first day at Wetherby School on September 11, 1989.

Princess Beatrice and Princess Eugenie - The Duchess of York really liked to dress up her children in matching outfits. Here they are again at a film premiere in 1996.

Prince William and Prince Harry - Diana, Princess of Wales is pictured with her sons wearing matching outfits at Aberdeen Airport in 1989.

Princess Leonor and Princess Sofia - The Spanish royal family poses for the official Christmas photo in 2009.

Princess Beatrice and Princess Eugenie - The Duke and Duchess Of York pose with their daughters, who, once again, are coordinating outfits.

Prince William and Prince Harry - How adorable do Prince William and Prince Harry look in army uniforms? This photo was taken at Highgrove House on July 18, 1986, in Tetbury, England.

Princess Beatrice and Princess Eugenie - Princess Beatrice and Princess Eugenie in their cute ballerina outfits at 'Santa's Starry Night Show' in London.

Prince William and Prince Harry - The royal brothers smartly dressed at Zurich airport, ahead of their skiing vacation in Klosters, Switzerland in 1996.

Princess Beatrice and Princess Eugenie - The Duke and Duchess of York with their children at the Windsor Horse Show in 1992.