Need Gym Motivation? These Surprising Stars Will Provide You with Endless #Fitspo

Mr. Big still has it! The actor showed off his arm muscles on Instagram after a workout, and pointed out that he's still going strong. His longtime Sex and the City co-star, Sarah Jessica Parker, was so impressed with his gains that she chimed in, saying, “Still looking good!!!!," in the comments.

The 63-year-old Dancing with the Stars host showed off his chiseled abs in a shirtless selfie on Instagram, providing the ultimate fitness inspiration right before the start of summer. Bergeron posted the mirror selfie after the show's pro dancer Sasha Farber posted his own shirtless pic.

The actress is currently preparing for her starring role in Captain Marvel, where she'll be the first woman to solo-lead a Marvel action movie, and she's nailing the superhero strength so far. Larson shared three videos in April 2018 from her weighted hip thrust workout — a move that builds up glute and hip strength — as she built up the weight to a whopping 400 lbs.

Those arms! To prep for her role in action-thriller Peppermint, the actress shared a look at her gym sessions on social media in early 2018. She posted a video of her extreme workout routine, which she dubbed the "Recipe for Turning A Mom Back into Action Lady." Garner explained in the caption that she did an hour workout with Body by Simone and 90 minutes of "stunt team." She also worked cryotherapy into her routine. "It actually felt really good," she recently said of amping up her workout routine. "I was in pretty good shape going into it."

On the first episode of Jersey Shore: Family Vacation, Guadagnino's castmates proclaimed, "You lost your baby fat!" to the self-proclaimed Keto Guido. On top of squeezing in regular workouts, Guadagnino also follows a strict high-fat, low-carb diet.

For his as bad-guy Cable in Deadpool 2, Brolin hit the gym, where he gained muscular biceps and countless abs. "Josh sent me a few photos of Cable that he liked," Brolin's trainer, Justin Lovato, told Men's Journal in 2017. "I mean, the character is all arms and has a huge upper body. I knew it was going to be a lot of work, but I also knew how to help him get it done. Josh came ready to put in the work. For six weeks straight we were getting into the gym for at least three hours a day."

Krasinski is yet another actor who took his workouts to a whole new level in the name of performance. He shed 21 percent of his total body fat over the course of four months to portray an elite Navy SEAL in 13 Hours: The Secret Soldiers of Benghazi. The actor, who told Stephen Colbert he "couldn't do one pull-up" before training, turned to fitness guru Jason Walsh to get into flawless shape. "I gotta be honest: It was brutal at times," the star admitted to Men’s Health about his twice-a-day, five-times-a-week workouts. "We did tons of metabolic work, dragging sleds and all this stuff I've seen NFL players do." While the rest of the world was impressed by Krasinski's newfound beefcake status, his wife Emily Blunt was … not. "She hates it. She would way prefer to have doughy guy back," he joked on The Late Show.

At 63 years old, the Oscar winner is stronger than most of us will ever be. In 2016, we became aware of that fact when Simmons' trainer posted this buff photo on Instagram. "Every time we train together I forget he's 61 years old," wrote Williamson at the time. "So much respect for this guy."

Okay, so it's been quite a while since the Jurassic World star has debuted his washboard abs, but we'll never be over his physical transformation from funny guy to bonafide (and ripped) babe. "Six months seems like a long time unless you're looking backwards," Pratt, who lost 65 lbs. and gained muscle for his role in Guardians of the Galaxy, has said. "All you have to do is just a few things everyday and remain consistent, and time will fly just as fast as it flies if you're working hard or not."