Ryan Murphy's film adaptation of Larry Kramer's Tony-winning drama The Normal Heart is just over a month away from its May 25 debut on HBO. For a first look at the stage-to-screen project, watch the film's first official trailer, which highlights the historical events that led to the formation of Gay Men's Health Crisis. You'll also get an early taste of the shining performances from an all-star cast featuring Mark Ruffalo, Matt Bomer, Julia Roberts, Taylor Kitsch, Jim Parsons, Alfred Molina, Joe Mantello, Jonathan Groff, Denis O'Hare, Stephen Spinella, Corey Stoll, Finn Wittrock, and BD Wong.