Khloe Kardashian tugs at the waist of her skintight leggings to show off washboard abs during gym session

Khloe Kardashian dropped in on Instagram Saturday to share new content with her 310 million followers.

The 39-year-old reality television star — whose niece Penelope Disick celebrated her 11th birthday this weekend — used the app’s Stories feature to showcase her trim figure.

During a workout session the mother-of-two, who shares daughter True, five, and son Tatum, 11 months, with ex Tristan Thompson, flexed her washboard abs as she tugged at her leggings.

The Good American co-founder was dressed in a dark sports bra and coordinating bottoms.

As she stood posing in a wall-size mirror, she blasted Beyonce’s 2013 hit Drunk in Love. 

Looking good: The 39-year-old reality television star used the app’s Stories feature to showcase her trim figure

Khloe covered her face by holding her encased iPhone in front of it.

Her lengthy blonde locks were styled in a deep center part as they fell over one side of her chest.

She later followed up the short clip with another bit of footage that showed her moving slowly on a stairmaster.

The same tune played in the background, and Khloe recorded herself with a black and white filter.

It comes after the proud aunt took a moment to wish Penelope a happy birthday with a sweet tribute. 

She shared an old Keeping Up With The Kardashians clip in which Penelope is just a small tot.

She urged her niece to ‘say Koko,’ Khloe’s nickname, as she tried to entice Penelope with a spoon of yogurt.

Kardashian wrote along with the snippet: ‘I can’t believe my baby P is 11. Time really does fly by in a blink. I love you my sweet P.’ 

Gym rat: During a workout session the mother-of-two flexed her washboard abs as she tugged at her leggings

Meanwhile, Khloe’s younger sister Kylie Jenner was also active on social media as she savored the weekend.

Keeping her 397 million followers engaged, she posed in a teeny green bikini in a set of several pictures.

The 25-year-old bombshell put on a busty display in her strapless bikini top, which had a keyhole detail at the center.

The billionaire makeup maven revealed her toned abdomen as she sat on a chair in front of her pool.

Kylie wrote in the caption, ‘happy saturday,’ and quickly racked up millions of likes from her admirers. 

The star, who is rumored to be dating actor Timothee Chalamet, adorned her neck with two long gold necklaces.

Her dark hair was parted in the middle as she let the wind blow through them.

The mogul, who founded Kylie Cosmetics, was made up in a full face of flattering makeup. 

Sizzling: Meanwhile, Khloe’s younger sister Kylie Jenner was also active on social media as she savored the weekend

Interaction: Keeping her 397 million followers engaged, she posed in a teeny green bikini in a set of several pictures

Jenner, who is mom to two kids with ex beau Travis Scott, then added more content to her Instagram profile.

She followed up the carousel of images with striking video footage showing her luxuriating in the sun.

The clip was soundtracked by the Beatles song Something and it showed the star whipping her hair and moving in a sultry way.

She flirted with the camera as her diehard fans filled the comments with compliments.