McGillin's Broadway credits include Sunday in the Park with George, Kiss of the Spider Woman, The Secret Garden, The Phantom of the Opera, Anything Goes and The Mystery of Edwin Drood.

View the Entire Photo Gallery Patti Cohenour and Howard McGillin in The Mystery of Edwin Drood Photo by Martha Swope

As previously announced, the singer will join Tony winner — and former Anything Goes co-star — Patti LuPone as well as Norm Lewis and Seth Rudetsky on Playbill's third Broadway on the High Seas cruise.