Candice Huffine will front River Island's new plus-size collection RI Plus.
The 31-year-old beauty - who was the first plus-size model to appear in the prestigious Pirelli calendar - has praised the high street fashion retailers for the "perfect" range.
She said: "The fact that River Island is extending their sizing while staying true to their brand is perfection."
The stunning brunette also complimented RI for creating their designs with curvy figures in mind, insisting that just because the clothing is for larger ladies, it doesn't mean the styles have to be different.
She added: "It's clear they have thought about a curvy woman's body and designed accordingly while giving her exactly what can be found on the high street at any other size. A plus-size collection doesn't need to be made totally different, it just needs to be made to fit."
The forthcoming range is made to fit women who are size 18 to 24 and will debut in early March 2016.
River Island intend to make fashion inclusive by extending their sizes.
Their marketing director Josie Roscop, told Vogue.co.uk: "We're excited about giving great fashion to more women, we feel this is the right time for the brand to expand our size range offering. Ultimately, it's about fashion and being inclusive."