Known for its size-inclusive and sustainable approach, the brand has just signed with Tomorrow London and is launching a line of handbags.
The platform is cofounded by Terry Boyle, previously president of Nordstromrack.com, Trunk Club and HauteLook.
According to industry sources, Amazon will launch luxury via a concession model, starting with the U.S. market.
Gilhart will take on two roles at the business accelerator Tomorrow, where she has served on the board since 2016.