Elliot Page has claimed he had sex with Juno co-star Olivia Thirlby 'all the time' while they filmed the hit 2007 movie - just days after revealing
The Oscar-nominated star, 36, who was once known as Ellen Page said he was instantly attracted to Thirlby, now 36, who played Juno's best friend Leah in the film, as he recounted their fling in new memoir, Pageboy, obtained by
He said: 'I was taken aback the moment I saw Olivia Thirlby. She seemed so much older, capable, and centered.
'Sexually open, far removed from where I was at the time. But the chemistry was palpable, it pulled me in.'
Page - who played pregnant teen Juno MacGuff in the film - recounted how they started 'sucking face' in a hotel room after Thirlby confessed she was 'really attracted' to him - to which Page reciprocated her feelings.
He wrote: 'It was on. I had an all-encompassing desire for her, she made me want in a way that was new, hopeful.'
He added it was one of the first times someone would make him orgasm.
Page said he and Thirlby began having sex 'all the time', writing: 'Her hotel room, in our trailers at work, once in a tiny, private room in a restaurant … We thought we were being subtle. Being intimate with Olivia helped my shame dissipate. I didn’t see a glint of it in her eyes and I wanted that — done feeling wretched about who I am.'
Around the time Page and Thirlby filmed Juno, the pair were slated to star as the title characters in Jack & Diane - playing two young women who fall in love -but both dropped out before production, and the cast was replaced numerous times over.
Thirlby publicly came out as bisexual in 2011 - she has been married to Jacques Pienaar since 2014.
DailyMail.com has contacted representatives for Thirlby for comment.
This comes after revealed he had a secret relationship with Kate Mara after he came out as gay in 2014 - and while she was dating Max Minghella.
The Oscar-nominated Juno star, 36, who was once known as Ellen Page , details in his memoir Pageboy how he and Kate, 40, struck up a romance as he filmed X-Men: Days of Future Past and that Kate was 'in love with two people.'
Kate and Max went their separate ways in 2014 after four years of dating. She is now married to actor, with whom she shares two children.
In an excerpt from his memoir, obtained by 
, Page writes: 'The first person I fell for after my heart was broken was Kate Mara. She had a boyfriend at the time, the lovely and talented Max Minghella.'