"They were giddy with excitement," an observer at the wedding told People. "She looked incredibly happy."
The newlyweds were introduced by Stephen's twin brother, Michael Stagliano, who appeared on Jillian Harris' season of "The Bachelorette" on ABC.
Pappas first appeared on Brad Womack's first season of "The Bachelor," and went on to get engaged to Jesse Csincsak during her own season of "The Bachelorette" in July 2008. The couple broke up later that year.