Celebrity Cruises has announced a $16 million refit for two of its Millennium class ships.

Celebrity Summit and Celebrity Infinity will both head into drydock where they will receive elements currently featured on the Solstice class.

Infinity will head into drydock on October 15 when it will gain a new Rooftop Terrace, as well the features from newly unveiled suite class, first unveiled to the UK trade on Celebrity Eclipse. The new terrace venue will be on the 12th deck of the ship and will officially open on December 5.

Celebrity Summit will undergo a similar drydock in March next year.

On Infinity, restaurant S.S United States is being transformed into a Tuscan Grille, meanwhile on Celebrity Summit The Normandie will be converted into Tuscan Grille.

Lisa Lutoff-Perlo, president and chief executive of the line said: “The Rooftop Terrace is a brand-new way to enjoy the great outdoors on a modern luxury vacation.

“The popularity of our Lawn Club venues has shown us that some of the richest moments our guests enjoy are when relaxing in beautiful outdoor spaces. In creating the Rooftop Terrace, we wanted to create a hot spot where guests can kick back under the stars in the middle of the ocean, with amazing entertainment and food.”

As part of the revamp, both ships’ penthouses and royal suites will be transformed into the suite class experience.

“We want these suites to be so luxurious and comfortable that it’s difficult for guests to leave at the end of their vacation,” Lutoff-Perlo added. “We want the entire ship to turn heads.”

Both ships are also getting a portrait studio, a new future cruise sales office, a revamped Solarium area.

Infinity will offer Panama Canal itineraries when it emerges from drydock on October 29 and will offer the sailings until December 5 when the ship heads to South America.