The Juno star was gearing up to play Julianne Moore's lesbian lover in the movie and felt it was time to stop being secretive about her sexuality.

She tells Out magazine, "I remember thinking, 'Ellen, how in God's name could you make this film and not be out?'

"What's interesting to me is how long it took to make the movie - for it to finally come together - and how my internal progression toward coming out was naturally in line with it."

Page 'came out' last year (14) and is now working to use her celebrity to help other people in the Lesbian Gay Bisexual Transgender (LGBT) community.

She continues, "Stacie and Laurel's story (in the movie) is incredibly inspiring... It really did make me go, 'Dude, just tell people you're gay. Just get over yourself, honestly, and support those who are not as privileged'. It's like, 'You have f**king privilege, so do something with it'."

In the same interview, Moore credited her co-star for helping her understand her role, saying, "Ellen had so recently come out, and this is going to sound silly, and hopefully not hurtful, but I don't think I was aware of how painful it is to be closeted. I have the advantage of being a person who's never had to hide my sexuality, so I asked her a lot of questions - frank questions - about what that feels like... It was all very eye-opening for me... It definitely made me more sensitive to the nuances of our movie."