And Katie couldn't resist uploading a super cute snap of the little lady's hands on Sunday (29 June).
Katie, 30, added: "Sunday, Family Day."
In the picture, Belle's tiny fingers hold on to Katie and her man's hands. Too cute!
The charity campaigner gave birth to her first child just over three months ago, and has been busy embracing motherhood ever since.
And, as if it were ever in doubt, little Belle is already just as stylish as her chic mum. Just look at these adorable neon leggings!
Katie said on Instagram: "The sun is out so guess who is on trend kicking about in her neon leggings! Little present for Belle, they are from Pumpkin Patch @kiddicare."
Just a few weeks ago, she shared another super cute snap of Belle's bath time, as well as a picture of her cuddling her daughter as she recovered from some eye surgery.
More recently, Katie's been getting to grips with the challenges of teething and on Monday (30 June) she revealed to her Twitter followers: "Someone is teething!"
Yikes! We hope Belle feels better soon.
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