In Tortorella's new memoir "Space Between", the "Younger" actor -- who prefers the pronouns "they" and "them" as a "queer, non-binary, bisexual" -- recalled Kutcher confronting them for "being high" at a cast party for "The Beautiful Life", which Tortorella starred in and Kutcher produced.
As Tortorella had "just come out of the bathroom from doing a handful of key bumps", Kutcher approached the then 21-year-old and told them "Don't ever put anything up your nose," they wrote.
"Ashton's a smart dude, and he very quickly realized I was high. He got in my face and started yelling at me, telling me I was flushing my entire career down my nose in front of everyone, including Demi Moore and Bruce Willis,' they added.
"In my mind I was hyper-calm and in control, telling him this wasn't the place to have an argument like this, when in actuality my jaw was probably doing the Macarena as I was blaming everyone else," Nico explained.
Tortorella apologized the next day. "Life is not a dress rehearsal, Nico," Kutcher allegedly wrote back. "You either show up, or you're out."
The CW show was cancelled after only two episodes, but Tortorella came to a better understanding of how to deal with drug use after the run in with Kutcher.
"As a queer person, unfortunately the way that we usually find each other is in bars," the actor told People.
"It really lends to the fostering of addiction and alcohol and drug issues. I obviously went down that path quite a few times in my life. Only when I was really able to let go of that crutch was I able to really find myself."