Britain's Prince William visits his wife Kate at a London hospital where she's being treated for acute morning sickness.br br News that the much-watched royal couple are expecting their first child travelled quickly around the world Monday.br br On the streets of Paris, the royal pregnancy was cause for congratulations.br br (SOUNDBITE) (French) PASSERBY SAYING:br br "Ah, well it's great for her! It's perfect! It's normal!"br br (SOUNDBITE) (French) MALE PASSERBY SAYING:br br "Well, I'm happy for them, because it's always good to have kids. I mean, that's it. My brother's also going to have a kid, so there you go."br br No due date has been announced, but a royal spokesman said on Monday the Duchess is less than 12 weeks pregnant.