updated 10/18/2013 AT 11:00 AM ET
•originally published 10/18/2013 AT 9:05 AM ET
The Duchess of Cambridge, 31, left Prince George at home in Kensington Palace with Prince William for her first solo royal outing since giving birth in July. And she showed she’s back in shape as she leaped into action at the net.
The sports-loving princess was in her element among the athletes as she joined her charity, SportsAid, in the familiar surroundings of London’s Olympic Park.
Looking casual in navy jeggings by J Brand, a Breton-style top by Ralph Lauren and a one-button blazer by Smythe (she wore a similar outfit during a visit to the Olympic village in August 2012), she first chatted with young badminton players before moving on to speak to some wheelchair basketball players.
“She was really good,” Jordan Dalrymple, a volleyball player who’s benefitted from SportsAid, told PEOPLE of Kate’s effort at the net. “She told me she has played beach volleyball before. We were quite impressed. She had the basic skills down – and in heels.”