Margot Robbie held the longest plank in the 'Barbie' cast, beating Ryan Gosling by over a minute

• Margot Robbie came out on top in a plank challenge against her "Barbie" costars.
• She held her plank for four minutes and 10 seconds, beating Ryan Gosling by over a minute.

From mandatory pink days to cups of special tea, Margot Robbie was committed to her role as Barbie.

So it should come as no surprise that, even during a "Barbie" cast plank challenge, Robbie came out on top.

London-based personal trainer David Higgins, who worked with the cast during filming, shared a photo he took with Robbie in front of the challenge's results on his website.

While the photo showed that he held the top spot with a plank that lasted five minutes and 32 seconds, Robbie wasn't far behind after holding her plank for four minutes and 10 seconds.

She beat out costars Ryan Gosling (three minutes and two seconds), Hari Nef (two minutes and 15 seconds), and her husband Tom Ackerley, who clocked in at one minute and 36 seconds.

Higgins has been working with Robbie since 2015, when he helped her prepare for "The Legend of Tarzan," according to PopSugar. The "Barbie" cast worked out together while they were filming in London, which Higgins told the outlet was a "really collaborative, fun experience."

"Everyone was just up for a laugh and to feel good, it wasn't aesthetics," he added. "It wasn't like the superhero movies that I usually work on. 'Barbie' was more about: let's just feel good, and if you feel good, that's going to translate on camera."

Higgins also told the outlet that the Barbies in the cast typically did four days of Pilates and two days of strength and conditioning work per week, while the Kens in the cast — including Gosling and Simu Liu — did four days of strength work and two days of Pilates.

On strength and conditioning days, Higgins had the cast do a circuit-style workout that included exercises for shoulders, biceps, back, and lower body. He told PopSugar the circuit always finished with a move for abs, which was often a plank.

Planks help build strength and muscle throughout the body, and Robbie isn't the only celebrity with an impressive record. Cher once revealed that she's held a plank for five minutes.

When it comes to staying fit, Higgins told PopSugar that it's good to mix things up and try new workouts.

"Why don't you learn how to do it all?" he said. "And you can, because the body responds significantly well to diversity."