Sweden: Princess Madeleine, Princess Lilian, Crown Princess Victoria, King Carl Gustaf, Queen SilviaRiiiight?! As part of the festivities for King Carl Gustaf and Queen Silvia's silver wedding anniversary in 2001, they decided to hold one such shindig, and the results were glorious. You have to love King CG and his "this wig is ridiculous, deal with it" stance, don't you?
Norway: Princess Märtha Louise, Crown Prince Haakon, Crown Princess Mette-Marit (actually, this was a couple months before their wedding), King Harald, Queen SonjaThe Norway bunch were also willing to play the costume game. Not all the royals in attendance chose to play along (and we have no time for party poopers here), but you know who did it the best, right? I don't need to tell you, do I?
Queen Margrethe and Prince Henrik of Denmark, with Queen Anne-Marie and King Constantine of Greece behindThese two crazy kids. Of course Daisy, the costume designer, and Henrik, perhaps the royal male with the most sartorial flair (not always the most successful sartorial flair, but still), did it up right. They spread the love to all the family, too.
Princess Benedikte of Sayn-Wittgenstein-BerleburgThe only thing surprising here is that Margrethe and Henrik didn't come up with a reason to have a big royal costume event like this every year at home. Maybe someday...
Photos: via Getty Images as indicated