White is starring as the wrestler Kerry Von Erich in the Sean Durkin-directed drama, which co-stars Zac Efron and Harris Dickinson. The actor told GQ magazine that he’s gaining 40 pounds of muscle for the role.

The Iron Claw tells the tragic true story of the Von Erich wrestling troupe. Kerry Von Erich’s career was derailed after a motorcycle accident resulted in his right foot being amputated. Kerry later died by suicide. White said there are parallels between Kerry and the chef Carmy he plays on “The Bear.”

Zac Efron has gone viral on social media due to photos of him from “The Iron Claw” set, in which he appears jacked.

Efron wrote to White “a really lovely note” after the latter was cast in the film. The letter read: “Get training, eat, keep doing what you’re doing, stay hard.”

The film is one of many projects White got courted after the explosive success of The Bear.

According to White, “four A24 scripts” landed on his desk after the show’s runaway success and “The Iron Claw” was chosen.

As reported by GQ, White’s career shifted after The Bear, when Oscar winner Kathryn Bigelow invited him out to lunch just so she could bounce a few ideas for projects off him.

“Out of nowhere there were ‘four A24 scripts on my desk,” White says. And he heard from a friend that Dustin Hoffman — another idol of his — loved the show so much that he wanted to send White a handwritten letter.”

White’s career resurgence is surprising even to him considering he played the same character, Philip “Lip” Gallagher, on the Showtime series “Shameless” for 11 seasons and 134 episodes across 10 years.

White admitted that he was left in “upsetting head space” when the show came to an end after a decade.

“I love ‘Shameless’ so much. I love everybody that was a part of it, and the experience was incredible,” White said. “But I’m not sure if shows are meant to go that long… There was a period where I stopped feeling like an actor and I started feeling like I was just here to do this show.”

White added, “It was an upsetting head space to be in. When it was going to end, I was questioning: maybe I do just exist on this show. What else is there? Am I an actor? I was definitely having a lot of doubt when I was finishing ‘Shameless.’”

A24’s The Iron Claw will debut in 2023.