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Sting is hoping to save his ship from sinking, that is, his Broadway musical, "The Last Ship," by jumping aboard.

The Police frontman will be joining the cast of the show, about the British shipbuilders of his youth, for which he wrote the music and lyrics, for eight shows a week, starting Dec. 9 through Jan. 10.

"I've been working on this show for five years and been at every rehearsal, every performance, so it's not like I've flown in from Planet Rock Star to save the day," Sting told The New York Times in an interview on Sunday.

He offered to show his rear end "in Macy's if it will help our show."

According to the Times, the $15 million musical, which has earned mixed reviews, has been losing $75,000 a week since performances began Sept. 29. Without Sting, "The Last Ship" has been grossing about $500,000 to $600,000 a week and needs at least $625,000 a week to break even and sustain a Broadway run.

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"I wasn't aiming this at my fans," said Sting, who last appeared on Broadway in a 1989 revival of "Threepenny Opera." "And I didn't assume it would be cake coming to Broadway with an original musical. But it's only become clearer to me that nothing's guaranteed."

The singer, who told cast members Sunday that he was joining them and made the official announcement today, will replace his friend, Jimmy Nail, in the role of Jackie White, the foreman of a British shipyard who appears in about 40 percent of the musical. Sting told the Times that he was only joining the show with Nail's blessing.

Fortunately, the Grammy winner doesn't have much preparing to do.

"I know all the lines and lyrics after all these years," he said with a laugh.