Sneak Peek: The Courageous Story of 'The Normal Heart'

Julia Roberts, Matthew Bomer, Mark Ruffalo, Jonathan Groff, Taylor Kitsch and Jim Parsons star in the play-turned-movie The Normal Heart, and we have a sneak peek!

Julia Roberts, Matthew Bomer, Mark Ruffalo, Jonathan Groff, Taylor Kitsch and Jim Parsons star in the play-turned-movie The Normal Heart, and we have a sneak peek!

The film, written by Larry Kramer and directed by Ryan Murphy, takes place in the early 1980s and follows gay activist Ned Weeks (Mark Ruffalo) as he attempts to raise awareness of HIV/AIDS.

"The Normal Heart is really about the first very courageous group of people who were willing to stand up and speak out about AIDS," said Bomer, who plays Ruffalo's AIDS-stricken boyfriend Felix.

This small group of crusaders were delivering a message that no one at the time -- even some in the gay community -- didn't want to hear.

"It's kind of incredible to turn your back on a whole group of people who were suffering and terrified," said Roberts, who plays Emma, a wheelchair-bound doctor.

For many, the story will provide a lesson of what life was like during the epidemic and what a difference one voice can make.

"These times are the moments where history is made," said Mark Ruffalo.

The Normal Heart premieres Sunday, May 25 at 9/8 C on HBO.