In a candid interview with Playboy, the 34-year-old new dad agrees that pot is a "creativity booster" for him.
"When I smoke weed I'm more liable to make connections I wouldn't otherwise make," Gordon-Levitt admits. "Sometimes those connections are ludicrous. But sometimes they’re great. You're like, 'Oh sh*t, I might not have thought of that,' and it actually makes sense in the morning."
Though The Walk actor doesn't smoke on the sets of his movies, he does recall smoking weed with director Oliver Stone, who he worked with on the highly anticipated Snowden.
" ... With Oliver it was really nice because most of the time we were in this kind of high-stakes situation of working, and when we were smoking, we just smoked and watched a couple of movies a few times," he reveals. "We watched Paths of Glory, the Kubrick movie, and we watched Grand Hotel, with Barrymore and Garbo."
"Oliver's a hilarious, fascinating dude -- incredibly smart and good to hang out with. But he's also very direct," he adds. "He's not afraid to challenge you, both at work and in social settings. He'll say sh*t people don’t say."
The former child star also surprisingly admits to having experienced harder drugs.
"Well, acid's a lot more intense," he says. "I consider both psychedelic and kind of the same thing. Your mind will make connections that you wouldn’t otherwise make."
Lots of big life changes have recently come for Gordon-Levitt, who welcomed his first child with his wife, Tasha McCauley, last month. The actor and technology entrepreneur are notoriously private, keeping their baby news a secret, as well as their Dec. 2014 wedding at their Los Angeles home.
"It wasn't that difficult because we didn't tell many people about it," he explains, remaining tight-lipped about their relationship. "As much as some people may disagree, I don't believe a person's private life -- even a person in entertainment -- is a public performance."