Guest speakers at Assembly have included alumnus Jay Thomas, authors Pat Conroy, Tony Hillerman, Sister Helen Prejean, Orson Scott Card, Dana Gioia, and Chaim Potok, New Orleans mayor Ray Nagin, mayor and alumnus Marc Morial, actor Jim Caviezel, theologian George Weigel, Jesuit Superior General Peter Hans Kolvenbach, ESPN announcer Mike Tirico, theologian and U.S.