PIC: Kate Middleton, Prince William Meet Danish Prince, Princess!

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Cute royal powers unite!

Prince William and Kate Middleton touched down in Copenhagen, Denmark on Wednesday to meet two other crowned heads: Mary, Crown Princess of Denmark and husband Frederik, Crown Prince of Denmark.

The Duke and Duchess of Cambridge, both 29, are in the Danish capital to take part in their first humanitarian mission to visit the UNICEF Supply Division Center, which will help provide emergency food and medical supplies to East Africa, where over 13 million people are suffering from a severe food shortage. See more pics of Will and Kate from PopSugar!

Kate and Mary (who married Frederik, heir apparent to Denmark's throne, in 2004) both dazzled side by side. Kate wore a long, belted red coat and boots, with her wavy hair down to her shoulders. Fellow brunette Princess Mary, 39, wore stylish gray pants, a modified pea coat and a light blue top.

Together, the British and Danish royals hope to raise awareness for the heartbreaking, mounting crisis in East Africa, where 320,000 children are currently suffering from severe, acute malnutrition and face death without immediate help.