Crowds of women gathered in a North London boutique this morning to buy designer castoffs, donated by Harper's mum Victoria Beckham.
Shoppers queued up to four hours early outside Mary's Living & Giving shop for the highly anticipated Save the Children sale.
The Primrose Hill shop, owned by retail guru Mary Portas, opened at 10am with 25 designer outfits once owned by Harper Beckham(4).
Former Spice Girl-turned-fashion designer Victoria had donated garments from high end labels including Chloe, Ralph Lauren, Stella McCartnery and Gucci.
The first one was snapped up in five minutes.
According to the Press Association, the sale raised thousands of pounds for the Save the Children charity, which aims to end child deaths from preventable causes by 2030.
Mum-of-four Victoria said she was delighted to support the charity's "wonderful" work.
"As a mother, I passionately believe that all children, wherever they live, have the right to a happy, healthy life. Everyone out there can do their part by purchasing or donating, ensuring children all around the world have the opportunity of a brighter future," she said.
Fronted by Save the Children ambassadors Portas and Erin O'Connor, a Fashion Saves Lives sale will take place on internet auction site eBay from today to June 28.
More information can be found at savethechildren.org.uk/fashionsaveslives.