11,000 calories a day will do that to ya.

Mark Wahlbergcan certainly appreciate a good cinematic physical transformation.

Wahlbergshared before-and-after photosfrom his experience on social media back in May 2021.

Mark Wahlberg Instagram post about weight gain for Father Stu

Mark Wahlberg says his ‘Father Stu’ weight-gain transformation ‘really took a toll’ on him.Mark Wahlberg/Instagram

He then talked about his rocky metamorphosis withJimmy FallononThe Tonight Showthat following July.

“I was eating every three hours.

It was not fun.”

What exactly was he eating?

“I tried to do it in a healthy way,” he toldE!this year.

The first two weeks were high proteins.

The second two weeks were a lot of carbs.

The last two weeks starches and then sodium, just to kind of get as bloated as possible."

“I do like having to prepare physically as well as mentally,” Wahlberg tells EW.

“That’s always ideal.

Let me start now.'

And I become a little bit obsessive about it.”

Father Stuopens in theaters April 13.

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