Kendall Jenner runs the risk of a wardrobe malfunction in grey mini dress with extreme thigh-split as she attends launch of her new clothing line with sister Kylie

Kendall Jenner ran the risk of a serious wardrobe malfunction on Monday night when she headed out wearing a grey jersey mini dress with an extreme thigh-split. 

The 20-year-old was pictured leaving the Nobu restaurant where she went for dinner in NYC, with her sister Kylie, following the launch of their new clothing line, the Kendall & Kylie Collection.

The Jenner sisters proved they really are wild about fashion as they both arrived in fur to New York City event for their clothing line.

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Whoa! Kendall Jenner ran the risk of a serious wardrobe malfunction on Monday night when she headed to her clothing launch and then Nobu restaurant in NYC, wearing a grey mini dress with an extreme thigh-split

Cosy look: The 20-year-old covered up in a fur following the launch of their new clothing line, the Kendall & Kylie Collection

The two girls were supported by their momager Kris Jenner who arrived in a very plunging outfit to the glamorous celebration.

Kendall, 20, teamed her dress from her clothing line as she reveals some leg while in open-toe, knee-high gladiator sandals, also from their range.

The gorgeous runway model wore her dark locks in flowing waves over her shoulders as she wrapped up warm in what appeared to be a leopard print coat.

While younger sister Kylie, 18, dressed in all black. The reality star wore dramatic lip paint as she also wore her flowing mane down over her shoulders.

Looking grrreat! Kendall and Kylie Jenner proved they really are wild about fashion as they both arrived in fur to New York City event for their clothing line on Monday night

We're a hit, sister! They are the proud purveyors of the Kendall & Kylie Collection

Stilettos with the fur! The two sisters showed they might differ in colour palette but they certainly still have a few things in common

So that's where they get it from! Kris, 60, wore an outrageously plunging pantsuit with sheer lace sleeves and a long train coat

They're pros! The two sisters showed off their fabulous figures as they posed for the cameras

So sweet! The two sisters shared an adorable moment together

A fuzzy black bolero jacket with leather sleeves as she sported skintight trousers and strappy heels. 

Kris, 60, wore an outrageously plunging pantsuit with sheer lace sleeves and a long train coat. 

The momager looked to be positively glowing, clearly proud of her two youngest daughters who have shown themselves to be quite the budding entrepreneurs. 

Careful! Kendall flashed her toned thighs, and almost a bit more after being caught by a gust of wind

Lovely look: She wrapped up in her big coat, holding a Givenchy leather bag in her hand 

The camera loves them! The pair were in fine form in their sharp outfits

Look of love: Kylie kept her eyes on her older sister

Momager has arrived! Kris showed her flair for fashion as she stepped out of a hired car

The Kendall & Kylie Collection marks their first independent foray into fashion, launching the debut collection from their eponymous clothing line, after years of working on collaborations with the likes of Topshop and Pacsun.

The reality star sisters unveiled the full collection, which is priced between $68 and $498, in January, to the delight of their fans and fashionistas everywhere.

Although perhaps slightly cheaper than many of the high-end designer items the girls wear on a day-to-day basis - their favorite brands include Givenchy and Balmain - the collection has clearly been inspired the girls' own personal sense of style, and includes a number of crop tops, cut-out dresses, boho-inspired pieces, and, of course, plenty of shoes.  

Three-line whip: Kanye West wisely bowed to pressure and attended the event with his in-laws

Good will Hunt-ing: Real model Martha was another of the high-profile attendees

He must have her on speed dial: Kardashian family gofer Jonathan Cheban and stylist June Ambrose seemed to have coordinated their looks

Phew: Kanye looked understandably relieved when he finally managed to escape

Indeed, the range features a whopping 54 pairs of different high heels and sandals, according to Refinery 29, with each of the 16 core styles in the collection available in a variety of different colors, from neutral beiges and blacks to bright blues.

Staying true to their own preferred aesthetic, many of Kendall and Kylie's pieces have been designed using a neutral, toned-down color palette of black, blush pink, white and beige, with some brighter, bolder blues and edge metallics thrown in for good measure. 

'The Kendall + Kylie collection has so many sophisticated pieces. I feel this is really just the beginning and it will become a HUGE brand,' one dedicated fan noted on Twitter, while another added: 'I literally want everything from the Kendall + Kylie collection. It's basically their wardrobe!' 

Baldwin thrills: Hailey looked in typically fine form in torn skinny jeans

The Skye's the limit: After the excitement Kylie was joined by Justine for a meal at Bob De Niro's  Nobu

Beauty: Kylie was looking as good as ever in the full glare of the flashing cameras

Fan friendly: She was happy to stop and pose for a snap with this desperate young man

One person notably absent was Tyga, who had partied with Scott Disick in Las Vegas at the weekend.

It comes after Kylie revealed on Keeping Up With The Kardashians she is desperate to have children, the cerebral teen telling her father Caitlyn Jenner, 'I feel like 30's too late. Every psychic said I'm only gonna have two kids.'

Tyga just laughs along as the trio sit at the dinner table, and does not seem ruffled by his girlfriend's admission.

Cailtyn, who is steadily enjoying her meal, adds: 'When you have one you might as well have two.

Who's that boy: Professional clotheshorse Hailey also headed to Nobu with a Bieber lookalike

Her new Baby? Kendall Jenner was later spotted leaving the eatery with the strapping young lad

I don't Beliebe it: She ended up cramming into the backseat of a vehicle with the understandably jolly youth

Look away now Tyga: Kylie posed up for an Instagram shot with the Justin Beiber lookalike named as Harry

'And you want your kids close together, that's why we had you. Might as well have the two so they have somebody to grow up with.'

Tyga now says he endured a tough upbringing in the notorious Compton neighbourhood, though he told a different story about his life in the suburbs on MTV game show Bustas back in 2008.

He said: 'Grew up not too tough, parents got a Range Rover. Doing it big, not too much hard, but I’m still street.'

On the show he also freestyled the line, 'they say I’m not hood cause I stay in the Valley, they say I never been in the alley,' while revealing he got his moniker because his mother 'used to say I looked like Tiger Woods. I just stuck with that.'

Update: Kylie let fans know that her sister was repping their brand

Gorgeous shoes! The model showcased a strappy number from their collection