The line’s second Edge-class vessel will operate a trio of 10- and 11-night eastern Mediterranean sailings and a new 11-night western Mediterranean voyage.

The cruises will follow Apex’s naming ceremony in Southampton next spring and a five-sailing ex-UK mini-season to the Norwegian fjords and the northern coasts of Spain and Portugal.

A new 10-night Capital Cities Cruise onboard Apex will also visit Amsterdam, Copenhagen, Oslo and France for Paris.

Celebrity Edge and the recently renovated Celebrity Silhouette and Celebrity Constellation will join Apex in Europe next summer.

The programme includes Celebrity’s first mini-season from Lisbon, new calls into Trieste and returns to Istanbul and Kusadasi in Turkey, and Oslo.

Lisa Lutoff-Perlo, Celebrity Cruises president and chief executive, said: “Now, with these four new and longer Mediterranean sailings, guests will have the opportunity to enjoy the peak European experience in true Celebrity style.”