Duchess Kate celebrates scouts at Windsor Castle ceremony

Wearing a mint-colored Mulberry coat over her baby bump, the pregnant Kate, Duchess of Cambridge, stepped out over the weekend to attend the National Review of Queen's Scouts.

The 31-year-old, who is expecting her first child with Prince William in July, chatted with scouts at the event, held Sunday at Windsor Castle. Many in attendance had received the Queen's Scout Award, the highest honor a scout can achieve, according to the BBC.

The award is given to scouts between the ages of 16 and 25 for achievements including participation in regular community service for a year and completing a four-day expedition in unknown terrain.

Kate joined the scouts as a volunteer in 2012 and works with a group close to her home in Wales. Last month, she braved cold and snow to take part in a training session for Scout Association Leaders.

Since she joined the scouts, more than 2,800 new adult volunteers have joined up -- the second biggest rise since 1986, BBC reports.

"The Duchess is an incredible role model and she helps us show that Scouting's not just for boys," Chief Scout Bear Gryllis said, according to the Daily Mail. "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."