Ellen Page -- who hit Hollywood hard with "Juno" -- just came out in pretty spectacular fashion -- declaring she's gay and saying, "I am tired of hiding and I am tired of lying by omission."

The 26-year-old actress formally unveiled her sexuality at the HRC's Time to Thrive event, an LGBT conference designed to help the LGBT youth, saying, "I am here today because I am gay ... and because maybe I can make a difference."

Page said, "I suffered for years because I was scared to come out. My spirit suffered, my mental health suffered and my relationships suffered. And I'm standing here today, with all of you, on the other side of the pain."