The "Fury" actor covers the latest issue of Interview magazine, where he appears wearing just a towel and opens up about his difficult relationship with his father.
The 28-year-old looks ripped in the accompanying spread, flaunting his big biceps in the pics.
The "Even Stevens" star also gets extremely candid about his relationship with his estranged father, calling their dynamic a "negative gift."
"The only thing my father gave me that was of any value to me is pain," he tells the mag. "The only time my dad will ever talk to me is when I need him at work. He knows to pick up the Skype phone call, and he knows what I'm looking for. It's not to say 'Hey, Dad.' We manipulate each other. We service each other. I use him when I go to work. It's not a real conversation; it's just an excuse to rev up. He's the marionette puppeteer. My dad is the key to most of my base emotions. My greatest and my worst memories are with my father, all my major trauma and major celebration came from him. It's a negative gift. And I'm not ready to let go of it, because anger has a lot of power."
The actor also opens up about some of his Hollywood idols, naming Sean Penn and Johnny Depp as a few of his big screen inspirations.
"This can be a very debilitating job for an actor. Sometimes you don't have any say about your creative process. And when I watched the movies of the guys I admired, it felt like they had put a spin on it. They were working on things that appealed to a certain kind of mythos. Whereas I think Tom Cruise or Tom Hanks came with something more heroic about them. Even in the comics I used to read, I didn't like Superman, I liked Venom. I was raised on 'The Simpsons,' 'Bebe's Kids,' and 'South Park.' I was raised with irony. And when I watch Sean Penn or Johnny Depp, guys who skew toward irony, it's far more appealing to me," he confesses.
Clearly, the former Disney star is well on his way to the top -- what do you think about Shai's candid comments? Sound off below and click "Launch Gallery" above to see even more photos from his shoot with Interview!