The themed cruises – music of the 1980s and stars from the West End and Broadway – will take place in October, leaving Southampton for Bruges and Amsterdam respectively.
As well as a programme of live entertainment, passengers on both cruises will be invited to take part in a myriad of experiences with opportunities to meet both stars of the stage and pop charts.
Jonathan Blackburn, founder of Floating Festivals, said: “We are all absolutely thrilled to be working together to launch the UK’s first ever Floating Festivals experience.
“Both cruises offer something completely different and whether you are a fan of musical theatre or you fancy throwing yourself back to the heady days of 80s pop, we are confident both will be very popular.
“These are not just cruises with a theme, these are festivals at sea. The moment the passenger enters the cruise terminal at Southampton they will start to revel in an experience of which they will be a vital part for the duration of the cruise.
“We don’t want to give too many secrets away but I think it’s fair to say the guests are going to have a few surprises along the way.
“We have a fantastic array of stars and performers for both cruises as well as many special features which will really make both these cruises a truly unforgettable experience.”