To welcome the ship, Carnival hosted local officials, travel partners and members of the media for a day of guided tours and lunch.

Earlier this week, the line took delivery of Celebration at the Meyer Turku shipyard in Finland.

"I can’t tell you how exciting this day has been, finally giving our UK travel partners the opportunity to see our new Excel-class ship," said Carnival president Christine Duffy.

"Carnival Celebration is the ultimate 50th birthday gift and is a key part of a very unique and exciting period of growth for us."

Celebration has since departed on a 14-day transatlantic sailing to Miami where the line will host its naming ceremony with godmother, US model and actress Cassidy Gifford.

Including Celebration, Carnival is adding five new ships to its fleet over the next two years in a period of growth "unlike any other" in the line’s 50-year history.

Today, a second ship in Australia will be added as Carnival Luminosa begins guest operations in Brisbane, and next year, the third Excel-class ship Carnival Jubilee will debut from Galveston.