The restaurant will serve traditional Italian dishes made from scratch including fresh pasta, bread and smoked and cured plates when it opens in March.
Former Novikov and Locanda Locatelli chef Claudio Covino will head up the kitchen, catering to a 58-cover dining room with both table and counter seating.
Dishes will include chestnut tagliatelle with hare ragu; pumpkin gnocchi with Taleggio cheese and black truffle; and wild boar casserole with honey root.
Select sharing plates will be served tableside, such as a dish of homemade tagliolini that waiters will mix with fresh pecorino cheese to make a sauce.
Formerly Belgraves, the hotel was relaunched under the Hari brand by its Hong Kong-based owner Harilela Hotels last year. It has been home to a number of high-profile chefs in recent years, including Mark Hix and Sophie Michell, both of whom have failed to make a lasting impression in the location.
Hix opened HIX Belgravia at the hotel in 2012, but it closed less than a year after opening. The following Pont Street restaurant was run by Michell, who left in 2016.