You've already seen Ellen DeGeneres make her hilarious Broadway "debut" in a Promises, Promises cameo opposite the show's stars Kristin Chenoweth and Sean Hayes, and now you can head backstage at the Broadway Theatre to watch DeGeneres prep for her big performance. The always outgoing host paid a visit to Chenoweth's spacious, sky blue dressing room where the Tony winner got very affectionate with her dog, Maddie. Afterwards Hayes stopped by to practice breathing exercises before they joined the rest of the Promises cast onstage to work on her singing. While her vocal work may need a bit of help, DeGeneres sure knows how to steal a show! Take a look below.