03/12/2012 11:30 GMT | Updated 03/12/2012 11:41 GMT

Kate Middleton Pregnant: The Celeb World Reacts On Twitter

Awwww, Kate Middleton and Prince William (aka the Duchess and Duke of Cambridge) have announced they are expecting a baby!

And we're not the only ones who are getting ever so slightly giddy about the thought of a new royal arrival - the celeb world is too.

Find out which famous types were the first to congratulate the Royal couple on Twitter...

Kate Middleton pregnant: Celebs react