It's been a busy week for that baby bump — not to mention the mother!
After attending the premiere for the movie on Monday night, the actress was spotted out and about in Mayfair the following day.
Kate looked classy in a simple black Isabella Oliver knot-front dress with a surplice neckline that clung to her curves, but still managed to seem comfy.
But, no, we'd rather think she took wardrobe cues from the Duchess.
In case U missed it, check out pics of Kate at the premiere in the gallery (below)!
[Image via Splash News.]