MS Costa Allegra is a cruise ship owned and operated by the Italy-based Costa Cruises. She was built in 1969 by the Wärtsilä Turku Shipyard in Turku Finland as the container ship MS Annie Johnson for the Sweden-based Rederi AB Nordstjernan. In 1986 she was sold to Regency Cruises with the intention of being converted into a cruise ship under the name MS Regent Moon but she was laid up instead.
Builders of the Costa Allegra are Finland, Genoa, Italy, T. Mariotti, Turku and Wärtsilä.