Hayes, who co-starred with Smash cast member Debra Messing on the sitcom Will & Grace, has been seen on Broadway in Promises, Promises and in the Encores! production of Damn Yankees.

Smash, which focuses on the making of a Broadway musical, also stars Christian Borle's, Jack Davenport, Megan Hilty, Anjelica Huston, and Katharine McPhee.