Kate Middleton is finally starting to look pregnant.

The expecting Duchess showed off her growing baby bump over the weekend while attending the National Review of Queen's Scouts at Windsor Castle on Sunday.

With only three months to go until her due date, we haven't seen too much of her pregnancy curves ... as she's stayed relatively small throughout her pregnancy and chooses to hide her stomach in complimentary clothing while out in public.

But Prince William's wife looked radiant in a green coat yesterday, proudly displaying her new figure as she walked around the Castle grounds.

See more expecting stars and their baby bellies in the gallery above!

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