The ship is due to enter service in November 2023.
'We are delighted to once again be in the hands of the talented engineers of Fincantieri, who will produce a ship of refined style, matchless elegance and breathtaking beauty,' Regent President and CEO Jason Montague said.
Sister of Seven Seas Splendor and Explorer
The 750-passenger, 55,500gt Grandeur is the sister of 2020's Seven Seas Splendor and 2016's Seven Seas Explorer.
The interiors are designed by Studio DADO.