The midfielder, who missed the Premier League contest due to injury, arrived unannounced to the delight of the hundreds of youngsters in attendance at the City Football Academy.
Grealish took part in a question-and-answer session, shedding some light on what he wants to achieve at City.
CITY V SPORTING: GET YOUR TICKETS
The England international then met with four lucky fans and their families, taking time to have a chat, pose for photos and sign autographs.
Watch the video above to see our No.10 give our junior supporters a priceless memory.
The Man City Kids Fanzone is a completely free event that runs for two-and-a-half-hours before every home weekend match on the indoor pitch located at City Football Academy.
Get involved with all our activities, meet Moonbeam and Moonchester, snap a photo with the trophies and take part in our competitions to win some exclusive City prizes!
PURCHASE YOUR FREE FANZONE TICKET
Come and join us at the next Kids Fanzone against Manchester United on Sunday 6 March, between 13:00 and 15:30 (UK).
You can find out more about the event by clicking here.
