Kate Middleton Behold The Royal Baby Bump

2/20/2013 1:45 PM PST

Pregnant Kate Middleton -- Behold, The Royal Baby Bump

Let there be no doubt ... Kate Middleton is ROYALLY pregnant -- and to prove it, she finally revealed her fetal protuberance while making an appearance in London yesterday.

A bunch of photos of Middleton's appearance have been floating around ... but this one really shows she's bumping along.

Yeah, baby.