Scarlett Johansson is in Cannes, along with pretty much every famous person in show business.

The 38-year-old actress and The Outset founder is making the rounds promoting her new movie, Asteroid City, and she’s certainly not screwing around in the fashion department. Scarlett just posed at a pH๏τo call in a gorgeous striped dress that showed off her super toned arms and strong legs, and I just have to say, I’m so impressed.

So what’s she doing to look so fit these days? The actress is notoriously private, but she’s shared a few snippets here and there. For starters, ScarJo is a freaking superhero (she plays Black Widow in the Marvel movies) and that takes some serious strength.

She works with trainer Eric Johnson of Homage to get in superhero fighting shape. “She already had this great training base, this huge foundational strength base,” Johnson told Shape of getting Scarlett ready for Black Widow. “We had a big ‘offseason,’ we had a lot of time to prepare, almost a year, so I could really get her foundational strength and condition really up to where we wanted it to be.”

Johnson said their workouts were “very efficient,” and the two usually got down to it starting as early as 5:30. They started with mobility work, like foam rolling, followed by stretches and “a ton of medicine ball throws,” per Johnson. “I’ll kind of start with a circuit to get her nervous system up and running, so we’ll do kettlebell swings or we’ll do some different kinds of jump plyometrics,” he said.

They also regularly mixed up moves to target a bit of everything. “I like to integrate various qualities from Olympic weightlifting, powerlifting, kettlebells, bodybuilding, bodyweight, yoga, and conditioning work,” Johnson told Women’s Health UK. Want receipts? Check out this pH๏τo of ScarJo lifting a ton of weights:

Johnson told Harper’s Bazaar UK that ScarJo follows a pretty strict diet while filming. “She cycled through days of high carbohydrates and low fat consumption, versus low carbohydrates and higher fat while maintaining protein intake,” he said.

She also did intermittent fasting, using a 12-hour fasting window each day—and she did this for nearly a year while filming Infinity War and Endgame.

Bobby Strom, a trainer who has worked with her in the past, previously told Us Weekly way back in 2012 that when first getting into superhero shape, she usually followed a vegan diet, eating several small meals a day. But Scarlett told E! in 2017 that she’s down for treats, even when she’s filming. “When you’re that disciplined, the ‘cheat meal’ doesn’t really exist,” she said. “You’re sort of like, ‘I earned this piece of chocolate cake—I’m going to go for it.’ You don’t even think about it.”