Kate Middleton turns heads with flat stomach during volleyball game - Watch

Kate Middleton wowed crowds yet again when she took to the SportsAid Athlete Workshop at Olympic Park to speak with athletes training for the upcoming Olympics. She wore a simple look with a pair of J Brand skinny jeans, a Ralph Lauren sweater and a Smythe one-button blazer, and flashed a surprisingly flat stomach while playing volleyball only three months after giving birth.

"Today" spoke to students training at the Park as Middleton spent time promoting sports that don't always get press. This was her first solo appearance since becoming a mother, and judging by the responses to her on Twitter, she did a great job.

The Duchess of Cambridge is the official patron of the SportsAid charity. In addition to helping to bring awareness to this good cause, she also is preparing for Prince George's christening, which will take place on Oct. 23. Kensington Palace tells Today it will be a "small, private, personal family affair."

Photo/Video credit: Today/Getty Images