Beginning mid-April, Princess Cruises will partner with Twentieth Century Fox Home Entertainment to screen the biggest movie musical of all time, The Sound of Music, onboard all 18 of its cruise ships and feature sing-a-longs, trivia games, and other movie-themed experiences throughout the year. 

The offerings celebrate the 50th anniversaries of both the cruise line and the musical and are part of a year-long campaign to honor the classic film.

In addition, Princess Cruises is offering movie fans chances to win a free cruise and a $500 onboard gift card every month through December 2015. 

"The Sound of Music isn’t just a classic film - watching the movie together is a classic family activity. In a year in which both Princess Cruises and The Sound of Music mark their golden anniversaries, this is truly a fun and memorable way to join in the celebrations,” said Jan Swartz, Princess Cruises president.

The Sound of Music will be shown once on every sailing throughout 2015 on Princess Cruises giant Movies Under the Stars top deck screens, with the sing-a-long version featured in the Princess Theater. Song birds can meet and rehearse for a special The Sound of Music edition of Princess Pop Choir and a themed Trivia Challenge will test fans' movie knowledge.