Kylie Jenner didn’t miss her Monday workout and proved it to her 399 million Instagram followers.

The Keeping Up With the Kardashians alum, 26, looked slim, trim and sculpted in a black sports bra with white trim and matching black and white leggings from the fitness brand Alo.

Kylie – who is still building her $15 million mansion in Hidden Hills – wore white socks with black stripes with white athletic shoes.

The Kylie Cosmetics founder had her black hair pulled back into a sleek French braid with face-framing tendrils.

She posed on a weight bench in her home gym and snapped a selfie in a mirror to show off her chic workout look.

Work out: Kylie Jenner didn’t miss her Monday workout and she documented it for her 399 million Instagram followers

The new home gym snaps come after Kylie’s new clothing line, Khy, made $1 million in sales within its first hour after launch.

People reported that her brand sold out of its faux leather trench, Moto gloves and mini dress.

‘The Khy trench & long sleeve mini sold out. Thank you thank you for all the love on Khy,’ she announced on social media.

The first drop – in collaboration with Brazlian fashion label Namilia – featured 12 sleek, black pieces ranging in price from $48 to $198.

The next collection from Khy will drop later this month.

‘I’m always experimenting with my style and I’m always switching it up. That’s why it was important to us to make the drops really different,’ Kylie explained.

The youngest of the Kardashian-Jenner sisters helped celebrate her sister Kendall Jenner’s birthday last week.

She sent her a bouquet of sunflowers with a card that read, ‘Happy birthday sister 30 years old!!! Time flies. Love you, Kylie.’

Alo: Kylie wore white socks with black stripes also from Alo with white athletic shoes

Fit and fabulous: The Keeping Up With the Kardashians alum, 26, looked slim, trim and sculpted in a black sports bra with white trim and matching black and white leggings from the fitness brand Alo

Kendall shared a photo of the flowers and captioned it ‘LMAO’ and included a middle finger emoji.

Kendall turned 28 on November 3 and she didn’t let Kylie’s joke dampen her spirits.

The Kardashians star also had an impressive four birthday cakes for her big day as she didn’t shy away from the festivities.

One of the cakes was decorated with the bouquet of sunflowers she received from Kylie.