Author, activist and playwright Larry Kramer is a political firebrand who gave voice to the outrage and grief that inspired a generation of gay men and lesbians to fight for their lives.

Last night HBO hosted the premiere of LARRY KRAMER IN LOVE & ANGER, airing June 29 at 9pm, at the Time Warner Center. In attendance to support both Kramer and the documentary were stars of stage and screen including Mark Ruffalo and Joe Mantello, both of whom starred in THE NORMAL HEART (on HBO and Broadway, respectively) as Ned Weeks, the character that Kramer based on himself. Documentary director Jean Carlomusto, Christine Baranski, Kelly Bishop, Cherry Jones, Stephen Spinella, and President of HBO Documentary Films, Sheila Nevins were also in attendance to screen the film and present Larry with a cake celebrating his upcoming 80th birthday on June 25. Check out a just-releasd trailer for the film below!

According to The New York Times, HBO is producing a documentary about Larry Kramer. As of now it is tentatively being called Larry Kramer: In Love and Anger. The film is set to be released sometime in 2015.