The new-build slots were previously been secured earlier this year for Marella Cruises for delivery in 2031 and 2033.

However, Tui AG said this "strategic decision" to move the slots across to Tui Cruises allows the brand to "build on the success of its Tui Cruises joint venture, which has a proven track record across various European markets and possesses the financial capacity for further expansion investments".

It also said the decision was taken to strengthen Tui Cruises' long-term growth platform in Europe and UK.

Tui Cruises is a joint venture between Tui AG and Royal Caribbean Group.

Marella Cruises' downpayment to Fincantieri will be reimbursed and it will continue operations with its existing five-ship fleet.

A Tui spokesperson said: "We are pleased to order two further new-build vessels at the Fincantieri shipyard in Italy. This move strengthens Tui Cruises' platform for long-term growth and enables us to gradually expand further also into other markets, in particular in Northern Europe.

"We look forward to leveraging our solid financial position and proven market expertise to deliver outstanding experiences for our guests."

The spokesperson added: "As the delivery of the new ships is scheduled for 2031 and 2033, there are currently no further details to share. Over the coming months, we will work on the next steps for this exciting project and will share updates as soon as they are available."