Royal Caribbean International recognized an important milestone today in its 45-year company history as it welcomes its 50 millionth guest onboard its fleet of 21 ships. The momentous occasion kicks off a year-long celebration honoring the cruise line’s guests, business partners, employees and crew.

“For more than 45 years, Royal Caribbean’s guiding principle has been to deliver the WOW to our guests, providing them with experiences, services and amenities that can only be found on Royal Caribbean,” said Adam Goldstein, President and CEO, Royal Caribbean International. “The men and women on our ships who deliver these WOW moments are what inspire our loyal guests to return to sail with us again and again.”

Spreading across the globe like a New Year’s Eve-style party, each of Royal Caribbean’s ships will recognize the milestone with shipboard festivities.

The onboard events will mark the start of a year-long campaign where consumers are encouraged to share their favorite WOW moments with Royal Caribbean over the years by posting photos, videos and memorable stories on Facebook, Twitter and Instagram with the hashtag #RoyalWOW.