Regulatory filings reveal the company has paid $275m for the 2,142 berth Brilliance of the Seas (built 2002).
Royal explains the purchase has been funded via its 2018 revolving credit facility, which has been upsized by $300m.
The end to the 25-year charter and subsequent buy will have no impact on its profit and loss account, the company added.
Last week Royal Caribbean revealed the promotion of Michael Bayley to chief executive of Royal Caribbean International, with Lisa Lutoff-Perlo taking the seat vacated by Bayley at Celebrity Cruises.
