Almost half of the Princess Cruises fleet is being deployed in Europe for next summer.
A record seven vessels for the 16-strong fleet will sail on 57 itineraries with more than 125 departures between April and December 2012.
The 3,114-passenger Caribbean Princess makes its European debut running round-Britain trips and cruises to Norway and Iceland.
Grand Princess returns to Southampton to run cruises to the Mediterranean and Northern Europe.
The ship will operate a new Baltic Heritage route covering Copenhagen, Stockholm, Helsinki, St Petersburg, Tallinn, Gdansk and Oslo.
Caribbean Princess and small ship Ocean Princess will also offer ex-UK departures. With Grand Princess, they will run more than 10 itineraries ranging from eight to 16 days in duration.
Five ships will sail in the Mediterranean, offering voyages from seven to 30 days. Both Ruby Princess and Crown Princess will offer the line’s Grand Mediterranean and Greek Isles fly-cruise itineraries, as well as Egypt and Aegean sailings.
Ocean Princess and Pacific Princess will provide small-ship sailing options in the Med.
With Grand Princess sailing to the Med from Southampton, passengers will be offered more than 25 different itineraries.
Emerald Princess returns to the Baltic region for the line’s 11-day sailings from Copenhagen.
Two new ports are added – the island of Korcula in Croatia, and Nessebar in Bulgaria, a UNESCO World Heritage Site.
Executive vice president Jan Swartz said: “The vast diversity of attractions in Europe has inspired our growing collection of intriguing cruise options.
“And our passengers have the opportunity to choose from a variety of ships, from our intimate small ships to the largest amenity-filled vessels.”