Celebrity Millennium class: Millennium, Infinity, Summit and Constellation
Compare Celebrity Millennium, Infinity, Summit and Constellation: refits, Retreat sundecks, conventional balconies, dining and scenic viewing.
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Millennium, Infinity, Summit and Constellation offer Celebrity’s main dining, theater and lounge routine on smaller ships than Solstice or Edge. They suit itineraries where you want a conventional balcony and comfortable places to return to after a day ashore.
The important caution is refurbishment history. Millennium and Summit received substantial Revolution updates, while Infinity and Constellation have their own upgrade histories. “The Retreat” is a shared booking concept, not proof of an identical suite sundeck on all four ships.
What matters for your decision
- A smaller footprint supports a straightforward daily routine.
- Entertainment and specialty-dining choice is narrower than on the newest classes.
- A shared Retreat label does not establish the same sundeck on every Millennium-class ship.
A smaller Celebrity layout with different refit histories
The long-established layout makes this a different proposition from a modern resort megaship. You gain a more compact set of choices and give up some of the newer classes’ dramatic public spaces and restaurant variety. Whether that is an advantage depends on how much time you expect to spend onboard.
Millennium, Infinity, Summit and Constellation
| Ship | What distinguishes the choice |
|---|---|
| Celebrity Millennium | Its Revolution-era changes include a dedicated Retreat Sundeck shown on the current plan; compare that arrangement with the other sisters. |
| Celebrity Infinity | Offers suite dining and lounge benefits, but lacks the dedicated Retreat Sundeck found on Millennium and Summit. |
| Celebrity Summit | Its Revolution refurbishment added a Retreat Sundeck and redesigned lounge. Compare its current cabin plan with Millennium rather than with the unconverted sisters. |
| Celebrity Constellation | Like Infinity, it does not have Millennium and Summit’s dedicated Retreat Sundeck. Its own cabin plan and refit history determine the room layout. |
Rooftop Terrace, the Solarium and scenic viewing
The Rooftop Terrace provides outdoor seating and a movie screen. The Solarium offers a covered pool setting, while indoor lounges provide places to sit when the weather limits deck time. These spaces are more relevant to the class’s appeal than a count of large attractions.
For scenic routes, locate the indoor observation and outdoor viewing options before choosing a room. A private veranda can be useful, but access to a public view on the other side of the ship may be equally valuable.
Everyday meals and category-restricted Blu and Luminae
All four ships list Tuscan Grille, Sushi on Five and Le Petit Chef among their paid options. Tuscan Grille focuses on Italian steakhouse dining; Sushi on Five offers Japanese dishes, and Le Petit Chef combines an animated tabletop show with the meal. The main dining room, Oceanview Café, Mast Grill and Spa Café provide included alternatives.
Blu and Luminae are room-benefit restaurants for qualifying guests. They should not be counted as additional open-access dining choices for an ordinary cabin. Conversely, a traveler who particularly wants one of them may find the corresponding category a more meaningful upgrade than a nominally newer ship.
Conventional balconies and ship-specific Retreat sundecks
Standard veranda rooms use a conventional outdoor balcony arrangement, but the exact room matters. Aft balconies and some corner or unusual locations can differ substantially from the generic category illustration. Check the current plan and category dimensions, including whether quoted area combines room and balcony.
Millennium and Summit have dedicated Retreat Sundecks. Infinity and Constellation offer suite dining and lounge benefits without that same outdoor area. If the private deck is a reason for paying the suite premium, this is a material difference; companions in ordinary rooms do not inherit your access.
For the itinerary and an uncomplicated daily routine
Choose Millennium class when the route, departure convenience and an uncomplicated Celebrity routine matter more than the newest architecture. It can be a strong fit for travelers who want a conventional balcony and do not need an extensive family attraction deck.
Move to Solstice or Edge when a wider specialty-dining choice, larger suite environment or specific new venue is worth the extra cost. The older class should be evaluated on its own merits rather than expected to deliver a scaled-down copy of every newer feature.
Pros and cons
| Advantages | Compromises |
|---|---|
| A smaller footprint supports a straightforward daily routine. | Entertainment and specialty-dining choice is narrower than on the newest classes. |
| Conventional balconies and established public spaces suit itinerary-focused travelers. | Refit histories and Retreat facilities differ materially between sisters. |
| Millennium and Summit have private Retreat Sundecks for qualifying guests. | Infinity and Constellation offer other Retreat benefits without that private deck. |
Other ships to consider
Solstice class adds more large-ship dining and outdoor choice. Edge class offers the newer architectural experience. Compare the same room benefits and itinerary before deciding that a lower fare or later delivery date settles the question.
Official deck plans
| Ship | Features and current information | Official deck-plan destination |
|---|---|---|
| Celebrity Millennium | Celebrity Millennium: official overview | Deck plans for Celebrity Millennium |
| Celebrity Infinity | Celebrity Infinity: official overview | Deck plans for Celebrity Infinity |
| Celebrity Summit | Celebrity Summit: official overview | Deck plans for Celebrity Summit |
| Celebrity Constellation | Celebrity Constellation: official overview | Deck plans for Celebrity Constellation |
Photograph and further reading
The photograph shows Celebrity Constellation at the date recorded in its credit. It illustrates the vessel, not a guarantee of its current paintwork, cabins or latest refit. Original photograph and attribution; photograph license.
Your decision checklist
- Choose Millennium or Summit if a dedicated Retreat Sundeck is essential.
- Compare the four ships’ actual itineraries and available balconies.
- Budget for Tuscan Grille, Sushi on Five or Le Petit Chef separately from main dining.
Questions travelers ask
Which ships does this guide cover?
Celebrity Millennium, Celebrity Infinity, Celebrity Summit, Celebrity Constellation. This operating roster was checked for September 23, 2026; future additions are not counted.
Which Millennium-class ships have a Retreat Sundeck?
Celebrity Millennium and Celebrity Summit have dedicated Retreat Sundecks. Infinity and Constellation do not share that facility, even though their suite guests receive other Retreat benefits.
Do these ships have Blu and Luminae?
Yes. Blu is the restaurant for qualifying AquaClass guests, while Luminae serves guests of The Retreat. They are not open-access alternatives for every cabin, and a Concierge Class booking does not provide the same dining benefits.
Official sources and further reading
Sources checked September 23, 2026. Explore the original policies, destination guidance and provider information behind this article. Each description explains what you will find at the source.
- Celebrity Cruises fleetFleet context; future bookable ships are excluded from this operating roster.
- Celebrity Millennium official ship informationShip features and layouts; booking-specific operation and inclusions can vary.
- Celebrity Infinity official ship informationShip features and layouts; booking-specific operation and inclusions can vary.
- Celebrity Summit official ship informationShip features and layouts; booking-specific operation and inclusions can vary.
- Celebrity Constellation official ship informationShip features and layouts; booking-specific operation and inclusions can vary.
- Millennium official deck-plan PDFShip features and layouts; booking-specific operation and inclusions can vary.
- Celebrity Rooftop TerraceShip features and layouts; booking-specific operation and inclusions can vary.
- The Retreat: ship-specific facilities and limitationsGeneric fleet footnotes can lag refits; use the individual current ship plan and dated completion notices where they conflict.
- Photograph: Celebrity ConstellationCelebrity Constellation · 2012 · Pjotr Mahhonin · CC0; Wikimedia thumbnail, displayed to fit the page.