The United States Coast Guard said it was searching for missing crew member Arron Hough, 20, who fell off the ship 267 miles northwest of Aguadilla in Puerto Rico.
Talent agency Russell Smith Associates said in July that Mr Hough would be joining the cast of Grease The Musical on the vessel.
Royal Caribbean said a member of its entertainment team on the Harmony of the Seas ship did not report to work as scheduled on Tuesday 25 December.
The company added: “We are saddened to report that after a review of the ship’s closed-circuit camera footage, he was observed entering an area on Deck 5 at around 4am and was not seen again.
source : skynews.com