Which is the largest passenger ship in the world in 2017?

MS Harmony of the Seas is an Oasis-class cruise ship built by STX France at the Chantiers de l’Atlantique shipyard in Saint-Nazaire, France for Royal Caribbean International. With a gross tonnage of 226,963 GT, she is the largest passenger ship in the world, surpassing her older sisters Oasis of the Seas and Allure of the Seas.