The star was spotted heading to the American Horror Story set in New York CityCredit: TheImageDirect.com

Kim opted to layer up in oversized clothing, hiding her butt from view completelyCredit: TheImageDirect.com

In the photos, Kim, 43, was captured heading to the set of American Horror Story, on which she’s bagged a major new role.

For her stroll to the television set, Kim had her hair slicked back into a sleek ponytail, and looked glowing in flawless makeup.

The Skims founder hid her eyes behind very dark shades, but seemed happy as she strutted down the sidewalk.

In contrast to her usual figure-hugging looks, Kim opted to wear loose black jeans, with the hem trailing down to her pointed heeled boots.

Kim layered her jeans with an oversized snakeskin jacket, which hid her torso completely and hit the top of her thighs.

While Kim hid her butt in the modest look, the star put her curves on full display in skintight leggings at a Balenciaga show on Saturday.

Fans of the Kardashians were shocked to see her butt looking much smaller, and joked about the dramatic change on Reddit.

One critic said: “I wonder how Kim lost weight on her butt. Ozempic does that? Lots of laughs.”

Another added: “Long, flat a**.”

“Kim’s butt is very flat? And literally keeps shrinking. Wow,” said another shocked fan.

NIP AND TUCK

Kim’s butt has been the focus of plenty of conversation, amid speculation that she has surgically altered her body.

Last year, Beverly Hills plastic surgeon Dr. Daniel Barrett told The U.S. Sun he thought Kim may have spent up to $170,000 on surgery.

Although Kim denied undergoing a Brazilian Butt Lift, Dr. Barrett did not believe her dismissal of the rumors.

The doctor said: “Kim has been famous for her body contouring!

“She appears to have had liposuction with fat transfer. At one point, her results were overdone and very exaggerated.”

Fans also questioned the Kardashians’ tendency to only take revealing bikini pics front-on.

One user wrote on Twitter: “Has anyone noticed how we don’t ever see bathing suit pics of any of the Kardashians/Jenners from the back? Is it because we’d see the BBL scars?”

FALLING FLAT

Earlier this year, fans speculated that Kim had got her butt implants removed.

The star raised eyebrows when she showed off her curves in a silver gown at the White House Correspondents’ dinner.

She stunned in the shiny Balenciaga Couture ensemble on the red carpet alongside her then-boyfriend, Pete Davidson, 29.

While fans praised the mom-of-four for her show-stopping look, others compared her appearance to previous years, particularly her slimmer backside.

On Instagram, one fan jokingly wrote: “And just like that BBL Kim Kardashian is over!”

A day after her outing, fans were shocked by Kim’s ‘flat butt’ in a video from a Balenciaga showCredit: TheImageDirect.com

Fans previously speculated that Kim had a Brazilian Butt Lift, but got the implants removedCredit: TheImageDirect.com

A plastic surgeon estimated that Kim had spent $170,000 on achieving her dramatic curvesCredit: GC Images