Pregnant Kate Middleton is finally showing the world her even bigger baby bump, as she was spotted flaunting her rounder stomach at the National Review of Queen's Scouts on Sunday.

The Duchess of Cambridge looked flawless as she wore a minted green fitted coat that hugged her baby bump.

The pretty spring coat had gold floral buttons and was topped with a brown straw pillbox hat over her sleek brown hair, dangling earrings and matching beige clutch bag. She wore light brown high heel pumps by LK Bennett, according to the Examiner. 

Middleton was all smiles as she was escorted by Chief Scout Bear Grylls and met with 400 Queen's Scouts from Britain and the Commonwealth.

"She's also such a generous volunteer and everyone is so excited to have her in the Scouting family. Many people have followed her lead and are getting involved and enjoying the adventure," Grylls said.

The event held at Windsor Castle honored many of Scouts who received prestigious awards for leadership involvement: community service, acquiring new skills, taking part in special projects, completing special training such as expeditions and sharing their skills with other scouts.

Sazeda Patel, a volunteer from Blackburn expressed her excitement for Middleton and said she appreciated all the hard work the Duchess has done so far.

"I did my training with the Duchess in Cumbria last month and had a great day with her. If someone as busy as the Duchess can find time to volunteer, anyone can! I couldn't recommend volunteering more highly; I just wish I'd got involved sooner," Patel said.

Simon Carter, assistant director of the Scout Association said the Duchess had done around half a dozen volunteering sessions with her local cubs this year.

"She loves it. I can't see her giving it up," Carter said.

Middleton is due to give birth this July. She nor Prince William have yet to confirm the gender of their royal baby.

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