Sun Princess vs Star Princess comes down to small refinements and where each ship sails, not size or style. The two Sphere-class sister ships are almost the same: about 177,800 tons, 4,300 guests, 21 decks and the same Dome, Piazza and restaurant line-up. Star Princess, which debuted in October 2025, adds a larger non-smoking casino area, more seats in O’Malley’s and Love by Britto, a ready-made SkyDeck sports court and a few new shows. For most cruisers, the itinerary and sailing date should decide the booking.
This guide compares the two ships side by side: specs, venues, dining, cabins and suites, entertainment and 2026-27 deployments. It ends with a quick way to choose between them. If you want a full tour of the first ship, see our Sun Princess cruise ship guide.
Sun Princess vs Star Princess at a Glance
Princess Cruises built both ships at Fincantieri’s Monfalcone yard in Italy as the first two members of its Sphere class, which is also the line’s first LNG-powered class. Sun Princess entered service in February 2024. Star Princess followed with a maiden Mediterranean voyage from Barcelona in early October 2025. The published specs are nearly identical:
| Feature | Sun Princess | Star Princess |
|---|---|---|
| Entered service | February 2024 | October 2025 |
| Tonnage | 177,882 | About 177,800 |
| Guests (lower berths) | 4,300 | 4,300 |
| Crew | About 1,600 | About 1,600 |
| Staterooms | 2,157 | 2,157 |
| Decks | 21 | 21 |
| Length | 1,133 ft | 1,133 ft |
| Non-smoking casino space | Standard layout | Expanded, with 68 extra slot machines |
| Top-deck recreation | Park19 (scaled back from the original plan) | SkyDeck sports court, track and splash pad |
Princess has described the Sphere class as its newest and largest ships. If you want to see how they fit into the wider fleet, our guide to the newest Princess cruise ships covers the full line-up.
What the Two Sphere-Class Princess Ships Share
About 90 percent of the onboard experience is the same on both ships. That includes the layout, most venue names and the general feel. Expect these features on either ship.
- The Dome. A glass-enclosed space high on the ship with a pool and bar by day. In the evening it becomes a performance venue for acrobatic shows.
- The Piazza. The three-deck social hub under a glass ceiling, with live music, cafés and bars.
- The Princess Arena. A theatre of almost 1,000 seats with a flexible stage for big production shows.
- Spellbound by Magic Castle. A close-up magic experience, ages 13 and over, developed with the Hollywood club.
- The Sanctuary and Lotus Spa. An adults-only retreat, with the spa and fitness centre on the upper decks.
- Modern staterooms. Warm, earthy décor, closed wardrobes and glass shower doors, which replace the curtains of older Princess ships.
Both ships also use the Princess MedallionClass wearable for keyless cabin entry, ordering drinks to wherever you are and finding friends onboard.

Dining: Small Upgrades on Star Princess
The dining line-up is almost the same. Both ships have about 30 restaurants and bars. The main dining rooms are Soleil, Eclipse, Horizons and the All American Dining Room, and The Eatery is the large food-hall-style buffet. Specialty venues on both include:
- Sabatini’s (Italian) and Crown Grill (steak and seafood)
- The Catch by Rudi and The Butcher’s Table by Dario
- Love by Britto, a multi-course tasting menu
- Makoto Ocean (sushi), Umai Teppanyaki and Umai Hot Pot
- O’Malley’s Irish Pub and Alfredo’s Pizzeria
Princess acted on early guest feedback from Sun Princess when it finished Star Princess:
- O’Malley’s Irish Pub has about 32 more seats. The pub filled up quickly on Sun Princess.
- Love by Britto has about 20 more seats, so reservations should be easier to get.
- The buffet area was reconfigured, according to cruisers who have sailed both ships. The exact service style in The Eatery has changed over time on both ships, so check current reports before you sail.
Specialty dining costs extra on both ships. Some of it is included if you book the Princess Plus or Premier package. Inclusions vary by sailing, so check the fare details for your date.
Entertainment: New Shows on Star Princess
Both ships host acrobatic shows in The Dome, Movies Under the Stars, magic at Spellbound and evening music in the Piazza. Star Princess also premiered several new productions:
- Meridian, an original Princess Arena show about a love story set on a cruise ship
- Illuminate, a circus-inspired spectacle
- Celestial Champagne Soirée, an evening event in the Piazza
- Candlelight Concert Series, performances held in The Dome
Show schedules change, and some productions may move between ships. If a particular show matters to you, check the Princess entertainment listing for your sailing.
Casino and smoking
Smoke-sensitive guests should note this one. Star Princess has the largest casino in the Princess fleet, and its newly designated non-smoking sections add 68 slot machines. Smoking is still allowed in parts of the casino, so it is not fully smoke-free. However, the non-smoking area is larger and better separated than on Sun Princess.
Top deck: Park19 vs SkyDeck
Princess first planned Park19 on Sun Princess as a big family play and recreation zone. It opened in a scaled-back form after construction setbacks. Star Princess was built with a finished SkyDeck from the start. It has a multi-sport court for pickleball, basketball and soccer, a jogging track, a splash pad for small children and shaded seating. Families with active kids may find Star Princess the better pick for this reason alone.
Cabins and Suites: Same Categories, Better Sanctuary Set-Up
Both ships have the same 2,157 staterooms in the same categories: interior, oceanview, balcony, deluxe balcony, cabana and mini-suite. Both also have premium tiers:
- Signature Collection suites, the top suites, with access to the private Signature Restaurant and Signature Lounge
- Reserve Collection mini-suites, with their own Reserve Collection Restaurant
- Sanctuary Collection, a newer premium tier of select balconies, mini-suites and suites. It includes the Princess Premier package and access to the Sanctuary Club, with a private restaurant, sundeck, pool and lounge for guests aged 16 and over
The main difference is timing. Sun Princess added the Sanctuary Collection in October 2024, after it entered service. Star Princess had it from day one. Guests who have sailed both say the Star Princess Sanctuary Club area feels better laid out, with a purpose-built dining space. If you plan to book this tier, it is worth comparing the deck plans for both ships.
A practical tip for either ship: the Sphere class has a lot of cabins on long corridors. Compare your cabin’s position with the elevator banks. On a ship this size, a cabin at the far end of a corridor means a long walk several times a day.

Itineraries 2026-27: Where Each Ship Sails
For most people this is the deciding factor. The ships are so alike that the region, season and date matter more than which hull you board. Here is the deployment Princess has announced as of October 2026:
| Period | Sun Princess | Star Princess |
|---|---|---|
| Summer 2026 | Western Mediterranean, 7-night Barcelona to Rome (Civitavecchia) sailings | Alaska Inside Passage, round trips from Seattle (May to September) |
| Fall 2026 | Mediterranean into the autumn, then repositioning for the Caribbean | California coastal and wine-themed cruises, then a 16-day Panama Canal crossing from Los Angeles on October 4, 2026 |
| Winter 2026-27 | Caribbean and Bahamas from Florida and Puerto Rico homeports | Caribbean and Bahamas from Florida and Puerto Rico homeports |
| Spring to fall 2027 | Mediterranean, April to November, 7 to 32 nights from Barcelona, Rome and Athens (Piraeus) | West Coast from Los Angeles, including a 7-day Mexican Riviera cruise on April 19, 2027 and a Panama Canal sailing on October 10, 2027 |
Princess announced Caribbean homeports of Fort Lauderdale, San Juan and Port Canaveral for winter 2026-27, but you will need to check which ship sails from which port. Many Caribbean sailings call at Princess Cays, the line’s private destination on Eleuthera in the Bahamas. Deployments can change, so always confirm on princess.com before you book.
Price and Value
Neither ship carries a big premium just for being newer. Fares depend mostly on region, season and cabin category. Some patterns to know:
- Star Princess Alaska sailings are usually most expensive in June to August, so early May and September departures are often better value.
- Sun Princess Mediterranean fares tend to be lower in the shoulder months of April to May and September to October. Ports are also less crowded then.
- When both ships sail the Caribbean in the same winter, compare the same week on each ship. Prices can differ for the same kind of trip.
- Check whether the fare you see includes taxes, fees and port expenses, and compare the cost of adding Plus or Premier.
Sun Princess or Star Princess: Which Should You Book?
- Pick the region first. For a Mediterranean cruise in 2027, choose Sun Princess. For Mexico, the Pacific Coast or a Panama Canal crossing from Los Angeles, choose Star Princess.
- If both sail your region, think about who is travelling. Families with active kids and smoke-sensitive casino visitors get a little more from Star Princess.
- Going for the Sanctuary Collection? Star Princess was designed around it, which some guests prefer.
- Let price decide the rest. If the dates suit you, the cheaper ship of the two is a perfectly good choice. Sun Princess has had more time to settle in and remains an excellent ship.
Still deciding whether Princess is right for you at all? Our comparison of Holland America vs Princess Cruises explains how the line compares with its more traditional Carnival Corporation sister brand.
Before booking either sister ship, read our rundown of Sun Princess cabins to avoid and the better-value alternatives.
If you are deciding between Princess and a UK line, our P&O Cruises vs Princess Cruises comparison covers ships, food and price.
FAQs
Are Sun Princess and Star Princess sister ships?
Yes. They are the first two Sphere-class ships from Princess Cruises, built to the same design at Fincantieri in Italy. Sun Princess debuted in 2024 and Star Princess in October 2025.
Which is bigger, Sun Princess or Star Princess?
Neither one, in practice. Both are about 177,800 tons, 1,133 feet long, with 21 decks, 2,157 staterooms and space for 4,300 guests at double occupancy.
What is new on Star Princess?
Star Princess adds a larger non-smoking casino area with 68 extra slots, about 32 more seats in O’Malley’s and 20 more in Love by Britto, and a SkyDeck sports court and splash pad. It also has new shows, including Meridian and Illuminate.
Is Sun Princess too crowded?
With 4,300 guests, it can feel busy at peak times in the buffet, the Piazza and on sea days. Booking dining and shows ahead, and using quieter areas such as the upper decks, helps. Star Princess has the same capacity.
Where is Star Princess sailing in 2027?
After a winter 2026-27 season in the Caribbean, Star Princess returns to the West Coast in spring 2027. Announced sailings from Los Angeles include a 7-day Mexican Riviera cruise in April 2027 and a 16-day Panama Canal crossing in October 2027.























