Jessica Biel Reveals The Truth About Her Viral Physique In ‘The Better Sister’

Jessica Biel is clearing the air about how she achieved her physique in “The Better Sister” after the internet has been obsessing over her shredded look, particularly her viral white-dress moment in the show, which showcased her sculpted back and arms.

In a candid TikTok video, the 43-year-old actress admitted that achieving “peak shape” required her to resort to strict measures. She told her 1 million followers on the social platform that during filming she lived the “most rigid lifestyle.”

“Everyone is talking… about the white dress,” Biel said in the July 10 video. “And how do we stay strong as we get older. Specifically, as women, how do we keep our back strong?”

The former model, who shares two young sons with husband Justin Timberlake, explained that while fans are in awe of her appearance in the Amazon Prime series, it’s “not maintainable” — not even for her.

“I wanted to share that, that peak shape in that show is not maintainable unless you are living the strictest, most rigid lifestyle with your nutrition and with your fitness, which I cannot do,” Biel continued. “So I’m currently back on my plan to sort of get a little bit back toward that shape.”

She then shared a few exercises from her fitness routine that have helped her maintain her figure, including hip thrusts and cable kickbacks.

Elsewhere in the video, Biel declared that “you’ve got to build muscle.”

“That’s a key part of my particular routine. And a ton of flexibility,” she added.

Biel wrapped up her video by telling social media users, “Let’s get older and stronger together.”

The star captioned her post, “I’m no expert but I want people to be healthy, safe, and strong. Remember to warm up and cool down, and let me know what other workouts you’d like to see!”

TikTok users praised the “Accidental Love” actor’s transparency in the comment section under the clip.

“Thank you for speaking about the lifestyle that comes with maintaining!” one person wrote. “This kind of transparency is so important [prayer hands emoji].”

Another commented, “Love how you are keeping it real about body shape and what is realistic. Thanks for being a great advocate for women taking care of their bodies and staying strong!”

“This is so heartwarming, real and informative!” someone else added.