New mum Kate gave birth to her and Prince William's first child, a baby boy called George, in July, at it seems she has shrunk back into shape in no time at all.
Kate, 31, was pictured with her midriff on show today (18 October) while visiting SportsAid Athlete Workshop, at the Olympic Park in London's Stratford.
She wore a striped navy T-shirt for the occasion, teamed with a navy blazer with gold buttons and dark blue skinny jeans - topping off her look with her trademark blowdry.
Kate had arrived at the event in her favourite pair of blue wedges, however it is unsure whether she kept them on as she headed onto the court!
A keen sportswoman, Kate was quick to get involved in the action and was pictured laughing and joking as she played volleyball.
This was Kate's first solo appearance since giving birth to Prince George, who Prince William has previously described as a "little rascal", and she looked glowing.
Motherhood clearly suits her!
Kate is a patron of SportsAid, which provides expert training and tuition to young athletes, and has made no secret about her love of being active.
Check out the pictures of Kate and William leaving hospital with Prince George here: