Your Emcee/MC will control the flow of events and handle all requests through your timeline. Make sure you hire someone who is experienced and has done weddings so they are familiar and comfortable to talk in front of a crowd. If possible, having your MC as a separate person rather than the dj or band is suggested since they can walk around and make sure certain people who will be announced or introduced are in the room at that time or to give them a heads up. The DJ and Band leader have to stay on stage.