Katie took the snap yesterday (28 April) after squeezing in an at-home visit from a beautician, who gave the new mum a manicure and pedicure.
While showing off her newly-painted plum toes and glossy nude nails, Katie also managed to include Belle's teeny foot in the picture.
Posting it on Instagram, the 30-year-old said: "Hour treat time at home from @VixTanandBeauty. Thank u 4 my beautiful pedi & nails! Guess who wanted to be in the pic!"
Inspirational star Katie gave birth to Belle on 14 March having previously told fans that she and her long-term boyfriend James were expecting a daughter together.
Katie had kept fans updated throughout her pregnancy and shared lots of bump pictures, alongside snaps of herself getting her nursery ready ahead of her due date.
After announcing Belle's arrival into the world, Katie thanked fans for their well-wishes, adding: "I'm reading all the messages and screen-shotting some of them to show Belle when she's older!"
Other celebrities who have welcomed babies in 2014:
Copyright: Rex Features WENN/Matthew Taylor/Daniel Deme/Josiah True/Matthre Taylor/Joe