Keeping Up With The cosmetics! Kourtney Kardashian set to follow in sister Kylie Jenner's footsteps and 'launch her own make-up line'

Her sisters have already successfully launched into the world of beauty.

And now Kourtney Kardashian is set to follow in Kylie Jenner and Kim Kardashian's footsteps as she delves into the world of make-up.

According to TMZ, the 38-year-old reality star has filed legal documents to own the business name 'Kourt' as she prepares to launch her own cosmetics line.

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Keeping her cards close to her chest, she filed the application under her company name '2Die4Kourt'.

MailOnline have contacted Kourtney's rep for comment. 

And while she hasn't hinted at any beauty range yet, the KUWTK star has recently been uploading more beauty content on her app, including her favourite natural cosmetics and her everyday make-up.

She was also the ambassador for New Zealand based skincare brand Manuka Doctor and prides her youthful look on regular detox salt baths, moisturising with organic coconut oil and drinking apple cider vinegar.

Kourtney also swears by using a hydrating face oil, and sleeping on a silk pillow case.

Her family are no strangers to beauty world with youngest sister Kylie, 20, launching a successful cosmetic range in 2015.

The beauty mogul kicked-off her business, Kylie Cosmetics, with her liquid lipstick and lip liner duo, the Kylie Lip Kit, and has since added eyeshadow palettes, lipsticks, concealer, foundation and make-up brush to her ever growing empire.

Although an e-commerce business, she recently delved into a bricks and mortar model with her Kylie Truck - which travelled to various locations around Los Angeles selling her line.

Kylie has been very successful as according to Women's Wear Daily back in September 2017, she had earned $420 million in retail sales in 18 months.

It is also estimated that her brand will hit one billion dollars by 2022. In the exclusive story, WWD reported at the time that Kylie Cosmetics will see a 25% increase in sales in 2017 - which would be $386 million.

Kylie told the website: 'I do want stores, my own store...I think it's time people walk into a store and see Kylie Cosmetics. 

In 2016, she released the limited edition Birthday Collection, which brought in $10 million in 24 hours.

Kylie's mom Kris Jenner presented documentation to WWD to prove the incredible sales numbers - the first time they have ever disclosed the information.

For comparison, Lancome reached one billion dollars in 2015 after 80 years in the beauty world, according to WWD. Estee Lauder's Tom Ford Beauty took a decade to hit $500 million in sales, they added.

Kylie released her first three items on November 30, 2015; they were the Dolce K, Candy K and True Brown K Lip Kits. 

The $29 kits - which have a lip liner and a coordinating lipstick - sold out in under 30 seconds on kyliecosmetics.com; WWD reported that they only had 5,000 kits in each color - so 15,000 units total.

Kylie and Kris have sine secured a partnership with Seed Beauty, a manufacturer based in Oxnard, California; they don't have any equity in her makeup company, WWD reported.

The February 2016 launch saw the product numbers increase to six products with a total of 500,000 units, as well as the Kylie Lip Kits officially becoming Kylie Cosmetics. 

And it's not only Kylie that reaping the benefits of the cosmetics world after Kim, 37, launched her KKW beauty range in 2016. 

In December, she revealed that her new shimmering highlighters and lip glosses - called the Ultralight Beams collection.  

The Keeping Up With The Kardashians star's perfume collection, KKW Fragrances, sold out in just six days.

The initial launch brought in about $14 million for the savvy businesswoman; she sold the entire inventory of $300,000 perfumes, according to People.

Kim's first collection included three fragrances: Crystal Gardenia, Crystal Gardenia Citrus and Crystal Gardenia Oud. She sold $1 million worth of perfumes one hour after its launch, TMZ reported.