The Duchess of Cambridge went along with her husband Prince William to visit the Harry Potter set at Warner Bros. Studios on Friday. William was to give a speech, and clearly Kate (and Harry too!) didn't want to miss out on the fun.

And, um... we totally understand.

Kate chose a sweet polka-dotted maternity dress from Topshop (one of our favorite stores!), and paired it with a Ralph Lauren jacket and classic black heels. Despite this being an incredibly busy week for our favorite Royal, she looked refreshed and happy as she arrived at the sets this morning. But like, who wouldn't be?

Aside from touring the Harry Potter sets (complete with a wand lesson), the trio was also able to see some of the props from the recent Christopher Nolan Batman movies, of which the two Princes stated they are big fans.

Click through the gallery to see some fun snapshots of the royal visit to Warner Bros., and check out Kate's maternity style below!

Photo Credit: Chris Jackson/Getty Images