Mark Wahlberg gained 20 pounds in 3 weeks for an upcoming movie and showed off his new look on Instagram

• Mark Wahlberg says he's gained 20 pounds in three weeks for a new movie.
• Wahlberg didn't share any details about the role but said he wanted to gain another 20 pounds.
• Wahlberg shared on Instagram in 2018 that he ordinarily works out twice a day.

Mark Wahlberg debuted a whole new look for an upcoming movie role after he says he gained 20 pounds in just three weeks.

The actor, model, and restaurateur showed off his new physique in a before-and-after Instagram post on Monday

"From left photo 3 weeks ago to this, now," Wahlberg wrote in the caption, crediting his private chef Lawrence Duran for his gains.

Wahlberg's famous friends took to the comments to remark on the drastic transformation.

"Yo. You wear mad chubby well homie!" Mario Lopez wrote.

Wahlberg's wife Rhea commented that her husband's new body "looks just as hot in person baby."

Over the weekend, Wahlberg also shared a video, taken at the gym, where he lifts his shirt to reveal his stomach. He's seen standing next to a friend and they're both wearing workout clothes and gloves.

Wahlberg wrote in the caption of the video post that he's gained 20 pounds and has another 20 left to gain.

Wahlberg is in the company of actors like Emma Stone, Tom Hardy, and Mark Ruffalo who have all gained weight for movie and TV roles in the past.

While it's unclear what kind of diet or exercise plan Wahlberg followed for his weight gain, he shared his usual daily routine (which includes two hour-long workouts, three meals, and three snacks) on Instagram in September 2018.

That same year, Wahlberg told Men's Journal that his typical workouts include exercises like balance and agility drills, foam rolling, and hip bridges in addition to routines with heavy bands, dumbbells, and kettlebells

He also credited Duran for changing his eating habits for the better.

"I used to be the type of guy who ate a whole rotisserie chicken for lunch," Wahlberg told Men's Journal about his former diet. "Chef Lawrence Duran changed that."

"The menu is mostly ketogenic-fresh greens, clean protein, healthy fats-avocado, almonds, olive oil," he continued, adding that he consumes "an extra scoop of protein powder" on "heavy-lifting" workout days.