Kenneth Lonergan's dark comedy, also starring Kieran Culkin, is directed by Anna D. Shapiro.
Long conducts his own unconventional interview with the opera superstar.
From New York to California, the stars are coming out to reclaim their theatrical roots.
Joe DiPietro's new comedy also stars Justin Long and Anna Chlumsky.
Judy Kuhn, Roger Rees, and more also join the festival's 2014 summer season.
Rivera will close WTF's 2014 summer season in the revival of Kander and Ebb's The Visit.