'I had to work really hard to be that fat': Chris Pratt jokes about his extreme makeover as he reveals swapping beer for vodka helped him shed the pounds
He's been open about his yo-yo weight journey throughout his Hollywood career.
But Chris Pratt has revealed that once he put his mind to it, his remarkable weight loss was down to a simple regime, quipping that he was never a 'naturally' fat guy.
The 35-year-old has never looked better as he prepares for the release of his biggest role to date - leading Jurassic World which marks the return of the huge movie franchise.
Hollywood hunk: Chris Pratt showed off his leading man good looks as she stopped by Good Morning Britain to talk about his new movie
Chris has been doing the promo rounds for the blockbuster over the past couple of weeks, stopping by Great Morning Britain in the UK recently where he tested the Jurassic World merchandise and chatted to Kate Garraway.
The star looked dapper in a waistcoat and shirt combo for his UK appearance, showing off his muscular arms in the rolled up shirt. But during his promo tour, the actor has been very open about his major makeover in recent years, as he put his body through the wringer in the pursuit of bigger parts.
He found fame as loveable Andy Dwyer in the hit show Parks and Recreation, which required him to pile on the pounds and keep the weight on for season after season.
What a difference! Chris - pictured here in 2009 - says he once weighed 300lbs
Major makeover: During the promo rounds for Jurassic World Chris has spoken out on his weight loss
Chris toned up to play a baseball player in 2011's Moneyball, before shooting back up in weight for 2013 movie Delivery Man, when he was at his biggest, confessing he was pushing 300Ibs.
Shedding the pounds again to play a Navy SEAL in the 2013 Oscar favourite Zero Dark Thirty was the turning point.
'I wasn't naturally a 285Ibs guy- I had to work really hard to be that fat,' the star joked to The Sun, adding that he's swapped beer for the gym as he confesses that while he once 'wanted until my stomach was sore...It's the complete opposite now, I go to the gym and work until my muscles are sore.'
Weight gain: Chris starred in 2013 comedy Delivery Man where he said he was at his heaviest
Popular guy: Since dropping the weight Chris, pictured with GMB presenter Kate Garraway, has stormed the box office and is set for more success with his new movie
Long journey: The 35-year-old's weight has gone up and down over the past few years
Before his weight loss, Chris says he could easily sink 12 beers in one session, but now he's got a new tipple of choice.
'I had to give up beer because it's too yeasty but I do drink vodka because I still have a good time,' explained the actor, who is married to Anna Faris.
The star had previously confessed during an interview with Men's Health UK that among the health issues he experienced at 300Ibs was 'impotence,'' a remark he has since been forced to clarify.
At his best: The star has revealed that swapping beer for a new tipple and intense workouts are his secrets
New lease of life: Chris says he had to act after reaching 300Ibs which led to a multitude of health issues
Speaking to Access Hollywood, the Guardians of the Galaxy star admitted that he hadn't been sure about the meaning of the word.
'I'm not sure I knew what "impotent" meant when I said it,' Chris revealed with a laugh. 'I had a lower sex drive, to be honest with you. Everything about my spirit was dull. I didn't feel great, and I think people will relate to that.'
After storming the box office last summer with his lead in Marvel's Guardians of the Galaxy, Chris is tipped for glory again this year with his role as Owen Grady in Jurassic World, which also stars Bryce Dallas Howard.
The film opens in cinemas on June 11.
Big kid: After leading 2014's Guardians of the Galaxy, Chris is back in another action-packed movie Jurassic World, playing with dino toys on Good Morning Britain
Dream role: Chris has landed his biggest part to date in the hugely anticipated comeback for the franchise
Not long now: Jurassic World opens in cinemas this weekend which will mean Chris' exhausting round-the-world promo tour is over
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