Apparently, the Mean Girls actress penned the revealing note whilst she was in rehab last year, with it eventually finding its way into the hands of a U.S. tabloid.
Franco, who initially insisted he had never been intimate with the red head, has now opened up about his romantic encounter with the actress.
On Howard Stern's radio show in America, the Spiderman actor revealed: 'Alright, maybe we kissed. It was lame. When we made out it was so long ago. I was, like, a nice guy. The kiss is enough. It was also like: "What the hell am I doing?" She was young.'
Franco added that he was in the middle of shooting Spiderman 2 when he hooked up with the star, with the actress just 17 at the time.
Years later, when James was studying at UCLA (University of California, Los Angeles), he stayed at the same hotel as Lindsay, during a 'very dark period of her history.'
'It seemed pretty damn clear that she liked me. She even broke into my room one time. I was on the couch and opened my eyes and there's Lindsay in my room at 3am!'
Lindsay's 36 strong conquest list included Ashton Kutcher, Justin Timberlake and Zac Efron to name a few.
James Franco has only recently recovered from the furore over his Instagram messages to an underage Scottish girl - who he tried to arrange a meet up with whislt she was staying in New York.