Ewan McGregor Halston Actor, Executive Producer Bill Pullman David Mahoney Actor Rebecca Dayan Elsa Peretti Actor David Pittu Joe Eula Actor Krysta Rodriguez Liza Minnelli Actor Rory Culkin Joel Schumacher Actor Vera Farmiga Adele Actor Gian Franco Rodriguez Victor Hugo Actor Sullivan Jones Ed Austin Actor Kelly Bishop Eleanor Lambert Actor Ryan Murphy Executive Producer Alexis Martin Woodall Executive Producer Ian Brennan Executive Producer Daniel Minahan Executive Producer Eric Kovtun Executive Producer Sharr White Executive Producer Christine Vachon Executive Producer Pamela Koffler Executive Producer