How Chris Messina Packed on Whopping 40 Pounds for New Role - See Other Extreme Transformations (Video)
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Extreme Celebrity Weight Loss

This might be the most fun way to gain some weight!

Chris Messina stopped by "The Late Show" on Wednesday, where he opened up about his recent 40-pound weight gain for his new role in "Live by Night."

"It was fun. It was a lot of fun," he told Stephen Colbert. "[I] just stuffed my face. Beer—lots of beer—bagels, pasta. I would have a beer by the bedside table, and I woke up in the middle of the night to pee and I'd just chug the beer."

Even his co-stars enjoyed his weight gain process. "It was fun," he added. "I was like a hero on set."

Messina's character in the book, from which the movie was adapted, is written as a fuller figure man.

"I'm [Ben] Affleck's sidekick and kind of, believe it or not, his bodyguard," Messina revealed, "So I thought the only way to maybe do that is to have some bulk."

Lucky for Messina, he's already dropped the weight and is now back to his normal size.

"Live by Night" hits theaters January 13.

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