The Retreat Lounge has been given a refreshed look, the Luminae restaurant has been expanded and new Sunset Suites have been added at the back of the ship.
The work took place before the 2,170-passenger vessel began its European deployment.
Keith Lane, Celebrity’s senior vice president of hotel operations, said: “The enhancements to Celebrity Infinity, particularly the transformation of The Retreat Lounge, epitomises our commitment to providing an unmatched experience for our guests, ensuring that every journey with Celebrity Cruises is memorable.