The actor opened up about his friendship with the Mean Girls star during a new interview with U.S. radio host Howard Stern, revealing the pair grew close several years ago while they were both staying at Los Angeles' Chateau Marmont Hotel.
Stern pressed Franco about the details, asking him, "You turned down sex with Lindsay Lohan, didn't you?" and the 127 Hours star replies, "Oh, gosh. Poor Lindsay. I haven't talked to her in a while... We were friends... I met her through friends... there was a moment when I was staying at the Chateau Marmont Hotel when my house in L.A. was being redone, so I did this thing where I just stayed at the hotel, and she had been living there for a couple (of) years. So we were living in the same place, so I got to know her."
The host then pushes Franco to answer the question, adding, "And you turned her down sexually?" and Franco responds, "I mean, I don't want to brag about it. I don't know how that got out... (She) was having issues even then, so you feel weird.
"Honestly... she was a friend. I've met a lot of people that are troubled and sometimes you don't want to do that."