Norwegian Cruise Line said it will exercise an option for a second "Breakaway Plus" vessel to be delivered in the spring of 2017.
The two ships in the class will be built by Germany's Meyer Werft at a size of 163,000 tons and for a combined cost of 1.4 billion euros, (about $1.85 billion), Norwegian said. They will each carry about 4,200 passengers.
Norwegian had previously said the option to build a second ship would likely be exercised.
The first Breakaway Plus vessel is due for delivery in 2015. It will have one more deck than the Norwegian Breakaway and be about 12% larger.Follow Tom Stieghorst on Twitter @tstravelweekly.