Chris Pratt Got Ripped For Marvel's 'Guardians Of The Galaxy'

Actor Chris Pratt just posted a photo to his Instagram account showing off his dramatic weight loss and newfound six-pack.

Pratt lost the pounds for Marvel's upcoming "Guardians of the Galaxy," in which he'll have the lead role as Star-Lord.

How did he do it? "Six months no beer. #GOTG Kinda douchey to post this but my brother made me," Pratt wrote alongside the below photo.

instagram.com/prattprattprattBefore beefing up, Pratt was most well known for playing the bumbling Andy on NBC's "Parks and Recreation."

NBC/"Parks & Recreation""I just like to gain weight and lose weight. It’s a rollercoaster," Pratt joked to Vulture of his weight loss and gain for film roles. "I just want to do this. I want to touch God."

Pratt packed on a reported 60 pounds for his role as a lawyer in the upcoming "Delivery Man" in which he co-stars alongside Vince Vaughn.

DreamWorks/"Delivery Man"In 2012, he got into tip-top shape for the Oscar-winning "Zero Dark Thirty."

"I was about 50 pounds or 40 pounds lighter than I am now," Pratt later told E! Online at the film's Hollywood premiere. "I worked out really hard and I cut out everything bad for me for a long time and I just focused on trying to become a believable Navy SEAL."

The actor shared the below photo of his filming physique while appearing on "Conan."

"Conan"/Chris PrattIn 2011, Pratt played real-life Oakland A’s baseball player, Scott Hatteberg, opposite Brad Pitt, Jonah Hill and Phillip Seymour Hoffman in “Moneyball.”

YouTube/"MoneyBall"Before that, Pratt appeared as Anne Hathaway’s ill-fated fiancé in the 2009 comedy “Bride Wars."

That same year, he married his real-life love, actress Anna Faris.

Michael Buckner/GettyThe comedy couple welcomed their first child, Jack, in August.

Ethan Miller/GettyDespite his A-list looks these days, let's not forget a lighter-haired Pratt starred as Bright Abbott on the WB's "Everwood" way back in 2002.

WB/"Everwood"