Sapphire Princess is a cruise ship owned by Princess Cruises that entered service in 2004 as the sister ship of Diamond Princess. At the time she was one of the world's largest cruise ships, with a capacity of 2,670 passengers and is the second Gem-class ship built by Princess Cruises. Sapphire Princess was christened on 10 June 2004, in Seattle—the first cruise ship ever to be christened in that port.

Princess Cruises is an American cruise line owned by Carnival Corporation & plc. The company is incorporated in Bermuda and its headquarters are in Santa Clarita, California. As of 2021, it is the second largest cruise line by net revenue. It was previously a subsidiary of P&O Princess Cruises. The line has 15 ships cruising global itineraries that are marketed to both American and international passengers.