For Zac, taking on a leadership role on the film felt like a no brainer.

"It's easy, man," he responded. "These guys are such talented, young actors. When you hear you're playing a professional wrestler, I think the hairs on the back of your neck go up a little bit. You're kind of vulnerable up there in the ring. From day one, just the commitment out of all these guys was extraordinary."

He continued, "I guess it felt kind of natural to just encourage them. I know how I was feeling when I got out there in my underwear and I was in front of the audience for the first time."

And it's clear the Iron Claw cast's bond extends far beyond their onscreen brotherhood. In fact, Jeremy, as well as director Sean Durkin, were among those supporting Zac when he received his star on the Hollywood Walk of Fame Dec. 11.

Keep reading to see more sweet moments from Zac's career milestone...