In 2004, "R Five" was chartered to Oceania Cruises. In 2005, Pullmantur purchased "R Six", and renamed her after "R Five" exited the fleet. A third "R"-class ship followed in 2006 when Pullmantur bought "Delphin Renaissance" and renamed her . Later that year, Pullmantur's fleet grew to six ships when it purchased "Pacific Sky" from P&O Cruises Australia and renamed her . In August 2006, Royal Caribbean Group announced it would purchase Pullmantur, making it Royal Caribbean's first wholly owned European brand. The acquisition was expected to be completed by the fourth quarter of the year.