The Real Greek and Project Pie are the latest restaurants to join the £85m WestQuay Watermark development in Southampton.
Mediterranean restaurant, the Real Greek, will be located on the lower promenade. The 325 sq m restaurant will be the brand's second outside of London but first in Southampton.
Casual dining restaurant, Project Pie, will also be making its Southampton debut in the form of a 130 sq m restaurant on the Long Room floor. The US brand encourages diners to be creative with their food by incorporating a create-your-own pizza element to the menu.
Sarah Fox, head of restaurants and leisure at Hammerson, said: "Each restaurant allows visitors to enjoy a different taste from around the world, building on the vibrant mix of global cuisine that the development already promises to deliver.
"We are proud to be expanding and be able to provide more people with the chance to experience our artisan pizzas and the fresh ingredients that we boast as part of our food offering."
David Page, chairman of the Real Greek, added: "We're very excited to be bringing the Real Greek to Southampton for the first time, and are looking forward to welcoming the city's diners. WestQuay Watermark is an ideal location for us - a new and vibrant scheme, it is well positioned on the South Coast and will be a big draw for customers from Southampton as well as the surrounding area."
Other confirmed restaurants include: Five Guys, Nando's, Byron, Wahaca, Jamie's Italian, Bill's, Zizzi's and Cabana.