Often a couple will pick men to serve as ushers who didn't make the cut to be groomsmen, or they simply ask some of their groomsmen to serve double-duty. An usher plays a critical role is helping to set the tone for your wedding and is often the first official welcome for your guests. Make sure to choose men that are naturally extroverted, who exude warmth, and have no problem making small talk for the five minutes it takes to help Great Aunt Helen find her seat.