RMS Queen Mary 2 (QM2) is a British ocean liner. She has served as the flagship of the Cunard Line since April 2004, and as of 2026, is the only active, purpose-built ocean liner still in service. Queen Mary 2 sails regular transatlantic crossings between Southampton and New York City, in addition to short cruises and an annual world voyage.
She was designed by a team of British naval architects led by Stephen Payne, and was constructed in France by Chantiers de l'Atlantique. At the time of her construction, Queen Mary 2 was the longest, at 1,131.99 ft (345.03 m), and largest, with a gross tonnage of 148,528 GT, passenger ship ever built.