The Dream class is a class of cruise ships, operated by Carnival Cruise Lines and Costa Cruises, The lead vessel of the class, Carnival Dream, entered service in September 2009.The Carnival Dream and her sisters, Carnival Magic, Carnival Breeze and Costa Diadema, measure about 130,000 GT and the first three are the largest ships ever built for Carnival Cruise Line. The vessel's design is an evolution from the Conquest class cruise ships.