Prince William has proved he's still has the "WOW factor" by coming first in Forbes' poll of the world's Hottest Young Royals.

In previous centuries the British royalty married royalty from other countries. Even today the monarchs in both the UK and Spain are married to members of the Greek royal family.

Could William continue with this tradition? The most compatible member of another royal family seems to be Princess Madeleine of Sweden, the daughter of King Carl Gustav and Queen Silvia of Sweden. She is just 11 days older than William.