(3:50 p.m. EDT ) -- Construction officially has begun on Royal Caribbean's fifth Oasis-class cruise ship, which is scheduled to launch in 2021.

In a press release issued by French shipbuilder Chantiers de L'Atlantique -- with which Royal Caribbean has had a longstanding partnership -- executives from both companies presented the first plate of steel, which was cut today during a small ceremony at the shipyard in Saint-Nazaire, France.

The yet-to-be-named ship will be nearly identical to its sisters Oasis, Allure, Harmony and Symphony of the Seas, though few other details have been unveiled. It will precede a sixth Oasis-class ship that was ordered by Royal Caribbean this past February.

Photograph of Royal Caribbean International executives during a steel cutting ceremony at the Chantiers de l’Atlantique shipyard in Saint-Nazaire  - Photography provided by Royal Caribbean International

Royal Caribbean recently took delivery of its new Asia-based ship, Spectrum of the Seas, and also has another new ship -- Odyssey of the Seas -- slated to debut in fall 2020.

Itineraries for Odyssey of the Seas and the two forthcoming Oasis-class ships have not yet been revealed.