The 27-year-old has recently been romantically linked to Liam Neeson's 18-year-old son Michael.
But according to TMZ her involvement with the teenager is strictly platonic.
She is purportedly "laughing off reports she's hooking up with Michael", who has been her friend for quite some time.
Insiders tell the website she is "laser-focused on her sobriety and her career" and is simply too busy "to worry about boys". All reports of her dating young male models, including Morgan O'Connor and Liam Dean, are said to be complete fabrications.
The 27-year-old actress has romanced a string of younger men of late, including 19-year-old model Liam Dean.
It hd been claimed she has grown close to 18-year-old Michael Neeson, whose father is Hollywood hardman Liam. Apparently the pair looked close while out partying at Finale in New York City.
"Lindsay seems to have this thing for younger men at the moment," an insider told Page Six.
"They were together at a house party of one of Lindsay’s stylist friends before Thanksgiving, and were together at Finale on Friday."
The troubled actress was court ordered into rehab earlier this year but is now trying to turn her life around.
Michael is Liam's son with his late wife Natasha Richardson, whose mother is Vanessa Redgrave. He and Natasha also have son Daniel and Liam has previously admitted he doesn't want them to follow in his footsteps.
"My mother-in-law is encouraging them, but that's mothers-in-law, isn't it?" he previously joked. "[They have shown no interest] in that direction. I'm kind of relieved because I think if you're the son or daughter of a successful actor it's a double pressure because so much more is expected of you."