Sphere-class cruise ship

The Sphere-class cruise ship is a class of cruise ships currently under construction that will enter service with Princess Cruises in February 2024. They will be the largest ships built for Princess Cruises and the company's first ships powered by liquefied natural gas (LNG). The first name was revealed to be Sun Princess.

Design and construction
In July 2018, Fincantieri announced it signed a memorandum of agreement with Princess Cruises, for the construction of two cruise ships with a gross tonnage of, the largest ships built in Italy. The deliveries were planned for late 2023 and early 2025. The construction was to take place at Monfalcone. The signing of the final contracts was announced in March 2019.

The ships have a capacity of about 4,300 passengers and will be powered by LNG. The vessels measure 345.3 m long with a beam of 47 m. The ships have 2,157 cabins and are served by a crew of 1,500.

Steel was cut for the first ship by Fincantieri in September 2021. The second ship is planned to be completed in 2025. It will be the largest ship ever built in Italy, eclipsing MSC Cruises' recently launched flagship MSC Seashore which currently holds the record at 170,412 gross tons. The first float out took place on 8 March 2023. Sun Princess was delivered on 14 February 2024. There were technical issues aboard the ship after entering service, delaying its first port of call.

In April 2024, it was announced that the delivery of the Star Princess will be delayed by two months.