Uniworld Boutique River Cruise Collection has confirmed it will launch two newly built ships in Europe in 2014.

The first, the Alexandra, a sister ship to the 164-passenger Antoinette, will sail the Rhine, Main and Danube rivers, while the Catherine will be fashioned after the 132-passenger River Royale and will sail in France.

The vessels will mark the first expansion of the Uniworld fleet in Europe since the Antoinette launched last year.

The ships are scheduled to set sail in spring 2014.