Princess Charlene of Monaco christened Regent Seven Seas’ newest cruise ship, Seven Seas Explorer  yesterday evening.

Accompanied by her husband and Monaco’s reigning monarch, Prince Albert II, the tiny Princess of Monaco and former Olympic swimmer, Charlene, 38, was wearing a full-length silver dress. The princess cut a red velvet ribbon and blew a kiss before smashing a bottle of Veuve Clicquot champagne against the hull of Seven Seas Explorer.

The ceremony took place before more than 700 attendees: Regent’s top executives, travel agents, journalists, employees, crew members and past passengers. The guests had taken seats in front of a stage alongside the vessel, billed as the most luxurious cruise ship ever. The two-hour event was hosted by Entertainment Tonight’s Kevin Frazier.

The christening was followed by a 45-minute performance of Italian tenor Andrea Bocelli, including La Donna e Mobile from Verdi’s opera Rigoletto, Time to Say Goodbye and the 1950s Dean Martin song Volare. Bocelli finished his concert with Nessun Dorma, the well-known aria from Turandot, eliciting a cheering roar from the audience.

Explorer is the fourth addition to the Regent’s fleet and the cruise line’s first new ship in more than a decade. At $450 million, the 750-passenger ship has 14 decks and boasts some of the most spacious and luxurious accommodations at sea and a remarkable guest-to-crew ratio of 1:1.38.

All of the 375 suites have real marble bathrooms, crystal chandeliers and oversized balconies. The pinnacle is the two-bedroom, 4,433-square-foot Regent Suite, overlooking the bow of the ship.  The suite comes with a private spa with sauna, an oversized, ocean-view hot tub, as well as a limousine and driver at the port.

Explorer  will depart on its maiden voyage on July 20 and spend its inaugural season in Europe with a range of 8 to 14-night Mediterranean itineraries starting at $6,799 per person. Then, it will reposition to PortMiami for a series of Caribbean sailings starting in early December.