“The Iron Claw” movie, released in 2023, took fans into the world of professional wrestling.

A family of wrestlers famous in the 1980s, their physique and fitness were paramount to their careers.

White noted that, likewise, the actors needed to prioritize the same traits to get into character.

Jeremy Allen White and Zac Efron on the red carpet

Unfortunately, he explained that some of them namely Efron were better able to bulk up.

Speaking toVariety, White admitted that he gained about 25 pounds of muscle throughout his pre-filming training.

White joked that the “Baywatch” actor became positively massive.

The cast at “The Iron Claw” premiere

“But it’s hard because we play brothers.

I do have to be around him.”

White even confessed to trying to keep Harris between himself and Efron.

The gym regimen also took a toll on Efron.

Meanwhile, his co-stars Harris Dickinson and Jeremy Allen White struggled with different aspects.

Dickinson felt that the process was abnormal for him, too.

“The physical transformation was hard.

I’m not naturally athletic like that,” he said.

In the end, White reportedly gained 40 pounds in total, according toThe Sun.

He looks really amazing in this thing," White said.

Unfortunately, that look is something he now has no interest in ever achieving again.

“It’s fake; it looks CGI’d.

And that required Lasix, powerful diuretics, to achieve …

The actor said took a toll on his mental health, too, leading to depression and insomnia.

Although the training was rigorous for “The Iron Claw,” Efron may have had a better experience.

“In the best way possible, I did not look anything like me,” Efron said.

However, Jeremey Allen White had a different experience.

Why do I even try?”