The little girl - who recently celebrated her first birthday - was snapped by a PR working with her mum, Victoria, taking what is probably some of her first steps.
The cute photo was then uploaded to Twitter by the MD of Kennedy PR with the message: "There's a very small girl called Harper in the house!"
Unlike her mum, Harper had a lovely grin on her face as she pottered along clutching Posh's hand, sporting a very cool side fridge and - presumably designer - frock. Natch.
Click on our gallery below for more of Harper's Highlights (you have to see the one of her chucking up in Posh's arms - genius).