Celebrity Cruises' Millennium sails to the Caribbean, Europe and on Transatlantic journeys. The ship has an onboard health center, a botanical conservatory and a music library. Finished with luxury touches such as wood and marble, etched glass and polished granite, the ship offers a choice of ocean-view and inside stateroom as well as suites.
The ship has 780 Ocean-View and 195 Inside cabins. Guests who require more space can choose from 26 Sky Suites, eight Celebrity Suites, eight Royal Suites and two Penthouse Suites. All suites have a bathroom with a whirlpool tub, a veranda and 24-hour European butler service.

Suite guests get welcome champagne, express luggage delivery at boarding, personalized stationery, private portrait sitting, and complimentary use of Thalassotherapy pool. The suite butler assists guests with unpacking and packing, and serves full breakfast, in-suite lunch & dinner service, in-suite afternoon tea service, and evening hors d'oeuvres.

The AquaSpa SM aboard the ship is a 25,000-square-foot facility with 16 treatment rooms and a fitness centers with panoramic views. Services offered at the spa include manicures, facials, massages, and thalassotherapy. At the fitness center, guests can taka a fitness class and hire a personal trainer.

Among the spa and fitness packages offered on the ship are: The Metabolism Booster, Oh, My Aching Back, Body Composition Analysis, and The Total Fitness Package.

The ship's main dining room, the 1940s-style RMS Olympic Restaurant, features table-side service, a demonstration kitchen and dine-in wine cellar. The restaurant is decorated with original paneling from the RMS Olympic. Five meals are served daily, including low-fat, low-calorie meals and children's meals.

Celebrity Cruises' Millennium has a unique botanical conservatory designed to offer its guests a calm place to enjoy a drink, admire flowers, or pick a bouquet.

The ship has a 14,000 square feet of designer boutiques, an internet cafe with 18 workstations, a two-story library, and a music library.

In addition to the spa and fitness center, the ship offers several swimming pools, whirlpools, dance floor, basketball court, jogging track, golf simulator, and shuffleboard.