We'll take this pair of royal inductions on our list back to back. Once upon a time, Princess Charlene of Monaco was known by the humbler name of Charlene Wittstock, although there was nothing humble about her sporting achievements. She swam for South Africa in the 2000 Sydney Olympics.
Prince Albert of Monaco, who's known to be a sports fan, encountered her at a swimming competition in 2006. As Grace Kelly's son, he knows a thing or two about elegance and class, and so he married Charlene five years later.