Director Francis Ford Coppola will be joined on stage by major cast members from "The Godfather" and "The Godfather Part II" as part of the Tribeca Film Festival's closing ceremonies. The event will take place at Radio City Music Hall on Saturday, April 29 following screenings of both films. Among those expected to appear: Al Pacino, Robert De Niro, Diane Keaton, Robert Duvall,Talia Shire and James Caan. Tickets went on sale this morning. Click here to order.