The 26-year-old told a Las Vegas audience Friday, "I'm here today because I am gay." She was speaking to a conference of counselors who work with teenagers who identify as lesbian, gay, transgender, bisexual or queer.
A video of her speech was posted on the Los Angeles Times website.
Page says she suffered for years because she was afraid to come out. She told the audience, "I'm standing here today, with all of you, on the other side of all that pain."
Page received an Oscar nomination for her performance in "Juno." She also had major roles in "X-Men: The Last Stand" in 2006 and "Inception" in 2010.