Riviera Reflection will go on sale on 18 March ahead of its debut on the Danube in September 2027.
Its design takes cues from sister vessels Riviera Radiance, launched in June 2025, and Riviera Resplendence, launching later this year.
The shop will feature a split-level lounge and Mosaic restaurant, as well as four 32sq/m grand suites on the Diamond deck featuring separate living and sleeping areas, as well as full balconies.
Will Sarson, Riviera's product director, said Reflection's unveiling was another "exciting milestone" for Riviera's river operation.
He added Riviera Radiance had been warmly received by guests and agents. "Riviera Reflection is another step in our commitment to offering the best quality on the river," he said.