'That eye roll tho': Kylie Jenner shows off her flat stomach and flashes her lace bra while out with Tyga

She jetted off to Costa Rica on Thursday with her family and her boyfriend Tyga.

And hours after heading out of Los Angeles, Kylie Jenner took to Instagram to post a snap with her beau.

The 19-year-old showed off her flat stomach - and also the bottom of her white bra - while rolling her eyes in the picture.

Strike a pose: Hours after heading out of Los Angeles, Kylie Jenner took to Instagram to post a snap with her beau on Thursday

The Keeping Up With The Kardashians star captioned the photo: 'Walk up in this b**** like...! That Eye Roll tho.'

Kylie wore camouflage patterned trousers slung low on her hips with a cropped long-sleeved shirt.

The teenager raised her arms and put her hands on her head, causing the top of her shirt to rise - and revealing her lacy undergarment.

Kylie added a diamond necklace and studded earrings for pops of sparkle. 

The makeup entrepreneur pulled her raven locks back and rocked pink painted lips with shimmery brown eye makeup.

Time for vacation: She jetted off to Costa Rica on Thursday with her family and her boyfriend Tyga; pictured with Tyga's son King Cairo, four, at the airport

Emulate Kylie's casual style in a Vetements oversized sweatshirt

Kylie Jenner prepared to take flight with the rest of the Kardashian klan to Costa Rica and the beauty entrepreneur dressed comfortably in a Vetements hoodie and Yeezy sweatpants and sneakers.

The Lip Kit creator is a huge fan of the brand having been spotted wearing their pieces on numerous occasions and so are the rest of her sisters.

This particular creation is part of a collaboration with sportswear label Champion and features an on-trend oversized silhouette, extra long sleeves and an undone hemline.

Get it for $880 by clicking through to Matches Fashion (right) or if you're not keen to spend so much, check out the affordable styles we've selected below.

Team with leggings and stiletto ankle boots to capture that Kardashian essence.

* PRICES MAY NOT BE AS ADVERTISED

Having a blast: Kylie sweetly held hands with Tyga's son King Cairo, four, as they made their way to the plane

Tyga is seen grinning in the background of the photo while wearing a backwards baseball cap, sunglasses and a colorful jacket.

Earlier in the day, Kylie snapped a picture with Tyga before heading to their private plane.

The lovebirds then headed to the airport for their flight to Costa Rica.

Kylie sweetly held hands with Tyga's son King Cairo, four, as they made their way to the plane.

Fancy travelers: Earlier in the day, Kylie snapped a picture with Tyga before heading to their private plane

They were joined by Kim Kardashian and her two kids North, three, and Saint, one; Khloe Kardashian; Kourtney and her three children: Mason, Penelope and Reign - ages seven, four and two; and also Kris Jenner and boyfriend Corey Gamble.

Kylie rocked Kanye West's not-yet-released Adidas Calabasas track bottoms with a bright red sweater.

Her sisters Kim and Khloe wore the exact same pair of bottoms earlier this month.

Kylie toted a Louis Vuitton X Takashi Murakami duffel bag while taking the mirror selfie.

Tyga coordinated in black bottoms with a graphic T-shirt and a Gucci bag, which retails for $2,850. 

What a goddess: Kim Kardashian carries son Saint with daughter North close by as they make their way to the private plane on Thursday - headed to Costa Ricka

Flawless: Kourtney Kardashian looked stylish as she made her way onto the plane while sporting Gucci sneakers; she brought her three children with her

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now