Seven Seas Grandeur is scheduled for delivery in Q4 2023.
President and chief executive Jason Montague described Grandeur as the "latest evolution in luxury cruising".
The ship, sister to Seven Seas Explorer and Seven Seas Splendor, will accommodate 750 guests and boast one of the highest space ratios and staff-to-guest ratios, Regent claims.
It will feature a reimagined Compass Rose design, the line’s signature restaurant.
Further details of the ship’s suites, restaurants, amenities and onboard experiences will be revealed in the lead-up to its 2023 debut.
Regent will unveil Grandeur’s inaugural season on 22 September, when its first voyages will also go on sale.