Ages: William, 28; Kate, 29
Occupation: Britain's King- and Queen-in-waiting
Previous TIME 100 appearances: 0
All eyes will be on London this April 29 as the world's most famous engaged couple tie the knot at Westminster Abbey. Besides helping to give the media and tourism industries a nice boost, the pair are possibly safeguarding the British monarchy's future. Prince William and Kate Middleton (surely to be known as Catherine once married) appear happier than William's parents, Prince Charles and the late Princess Diana, were and have won universal praise for their good humor and modesty; inviting both heads of state and locals to the wedding only endeared them further to the British public.