Four Agency’s travel team will set up a sales office for the line with the aim of getting more UK tour operators to feature and sell their itineraries to consumers.
The new sales task adds to the current PR consultancy services that Four Agency has been working on for the river cruise operator since the end of 2019.
Andrea Kruse, chief operating officer of Viva Cruises, said: "After more than three successful years working with Four as our UK PR agency, we are delighted to be also partnering with them on the sales front.
"Not only are they very familiar with our product but their sales and trade track record is second to none. I strongly believe Viva Cruises has appointed a like-minded agency that shares our passion and vision."