TUI AG
In 2008, after some twelve years of service as "Galaxy", she was renamed Celebrity Galaxy. In May 2009, she was transferred to the fleet of TUI Cruises, a joint venture between TUI AG and Celebrity Cruises' owner Royal Caribbean Cruises Ltd. She was renamed Mein Schiff () on 15 May 2009, Mein Schiff 1 in November 2010, and Marella Explorer in 2018.