The Duchess of Cambridge spoke about her baby bump while touring Kensington Leisure Centre in London on Monday morning (19 January).
Kate, 33, told teenager Martina McDonagh: "It's moving all the time. I can feel it kicking now."
Martina told The Telegraph that Kate revealed neither she nor Prince William have discovered the sex of the baby yet, but whatever it is, it's an active little thing!
Kate's had a busy day of engagements.
She started the week by attending a coffee morning for Family Friends, who provides help and programmes for vulnerable families.
Kate then officially opened the Kensington Aldridge Academy, before moving on to her final engagement of the day: launching the new Kensington Leisure Centre, which opens to the public in March.
The duchess looked beautiful in a Seraphine maternity dress, £99, and blue cashmere coat, £195, from the same brand.
While at the leisure centre, she was gifted with free lifetime membership for herself and her family, and indicated she was hopeful of bringing Prince George to the swimming pool for lessons.
Kate's second baby is due in March.
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