Comedian John Cleese is among the guest celebrities featured during ultra-luxury line Silversea Cruises launch of their newest vessel the Silver Spirit.

The Silver Spirit will embark on a jam-packed 91-day grand inaugural sailing. The voyage begins in Fort Lauderdale on January 21, 2009 and will call upon South American and Mexican ports before transiting the Panama Canal and ending in New York City.

Cleese will be aboard the February 20 segment from Buenos Aires to Santiago. Astronaut Kathryn Sullivan will sail from April 2 on the Los Angeles to New York leg of the voyage.

Silversea Cruises is including four on shore events for passengers booking 70 or more days. They are a naming ceremony gala in Fort Lauderdale on January 20, a polo match in Barbados on January 30, prime seats at the Sambadrome for Carnaval in Rio de Janeiro on February 14 and a Panama hat party in Ecuador’s Montecristi on March 16.

Additionally, all passengers on the grand inaugural voyage get three free ‘Silversea Experiences,’ a children’s ballet performance at the grand Teatro José de Alencar in Fortaleza, Brazil, a visit to one of the world’s largest Magellanic penguin colonies near Camarones, Argentina, and a folkloric presentation in the National Theater of Panama.

Visit Silversea’s Web site for more details.