The order includes one ship for each of the company’s three brands. All three ships will be delivered between 2036 and 2037.
Regent's vessel is slated to launch in 2036 following the debuts of its Prestige-class sister ships later this year, in 2030 and 2033. All four vessels will be built by Fincantieri.
Seven Seas Prestige's maiden voyage on 13 December will mark the line's first new ship class in 10 years.
It will be 40% larger than previous Regent ships but it will accommodate only 10% more guests.
The line claims "at 77,000 tons and carrying just 822 guests with 630 dedicated crew members, the ship offers one of the highest space-to-guest and crew-to-guest ratios in the cruise industry".
Chief luxury officer Jason Montague said: "When Seven Seas Prestige went on sale in June 2025, we enjoyed the biggest single booking day for the launch of a new ship in our history.
"We are confident that each ship in this remarkable class will be equally sought‑after, offering guests the most luxurious way to explore the world.”
Oceania Cruises, meanwhile, has placed an order for a fifth Sonata-class ship with Fincantieri, scheduled for delivery in 2037.
The announcement comes just weeks after the luxury line achieved a record launch day for its maiden Sonata vessel launching in 2027.
Oceania Sonata introduces two state-of-the-art culinary experiences: La Table par Maîtres Cuisiniers de France, the first restaurant at sea created in collaboration with the esteemed Maitres Cuisiniers de France and Nikkei Kitchen, a culinary concept celebrating the fusion of Peruvian ingredients and refined Japanese techniques.
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On Oceania Sonata, Montague said: “Oceania Sonata will set a new benchmark for spaciousness, artistry and residential comfort. The record-setting demand for Oceania Sonata affirms that travellers are seeking choice, connection and authentic experiences."
He added: "The addition of a fifth Sonata Class ship allows us to provide our guests even more enriching, experiential travel opportunities."
Norwegian Cruise Line's vessel will launch in 2037 and will carry up to 5,000 passengers.
