Kendall and Kylie Jenner showed off their figures in тιԍнт dresses during a surprise appearance at Marquee Las Vegas’ Summer Kickoff event.

Kylie slipped her curves into a skinтιԍнт red PVC dress while Kendall opted for a strapless black mini dress.

Taking to Instagram, the sisters — Kendall, 28, and Kylie, 26 — shared various outtakes from the soiree as they promoted Kylie’s Sprinter beverage and Kendall’s 818 Tequila.

The sisters — whose nephew Psalm turned five this week — posed up for pH๏τos and videos during the celebratory occasion.

It comes after the supermodel insisted that there’s never been a sibling rivalry over ‘who’s prettier.’

The family members were pH๏τo-ready as they delighted unsuspecting fans who were partying at the pool and bar.

Kylie put on a busty display in her dress, which was low-cut and featured spaghetti-thin straps.

She complemented the Sєxy number with a pair of ɴuᴅᴇ, backless heels with perspex straps.

The mother-of-two’s bouncy brunette locks were arranged in a center part and fluffy barrel curls.

And the makeup mogul’s visage was beautifully made up, with her cheeks blushed and her pout coated in a mauve lipstick with darker liner.

For her part, Kendall wowed in a layered, straight-cut top and matching teeny skirt.

She punctuated the simple and sophisticated outfit with strappy black heels.

The runway regular wore her dark hair loose, also style in a middle part as it flowed down her back.

The older Jenner had a pair of narrow black sunglᴀsses set atop her head in the series of pH๏τos and video clips.

And the Kylie Cosmetics founder also wore a pair of glossy, onyx shades in some outtakes.

This week Kendall opened up to Vogue about the dynamic between her and Kylie, whose parents are Kris Jenner and Caitlin (nee Bruce) Jenner.

‘Even with my little sister — the biggest thing we would fight over was the TV remote. There was never that who’s-better-dressed, who’s-prettier thing. It was always: You’re you, I’m me,’ she told the fashion magazine.

‘I’ve never thought of my career as a compeтιтion, and that’s thanks to awesome sisters. I really do me, and if you don’t like it, that’s okay. But I trust that me being the most authentic version of myself will get me to the places it needs to get me,’ she added.

Kendall and Kylie launched their careers as teenagers with Kendall + Kylie collaborations with PacSun, Topshop, Gillette, Steve Madden, Pascal Mouawad’s Glamhouse, and Glu Mobile.