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Published: 02:48 BST, 9 September 2020 | Updated: 03:18 BST, 9 September 2020

Keeping Up With The Kardashians was a ratings winner right out of the gate when it premiered in October 2007 on cable network E!.

It had been pitched by mom-of-six Kris Jenner to  TV host and producer Ryan Seacrest who was looking to bring a fly-on-the-wall show to E! following the huge success of MTV's The Osbournes that ran from 2002 to 2005.

Kris persuaded him that she and her children - three daughters and a son with former O.J. Simpson defense attorney Robert Kardashian and two daughters with Olympic decathlete Bruce Jenner - would be a perfect fit. 

Fly on the wall: Keeping Up With The Kardashians was a ratings winner right out of the gate when it premiered in October 2007 on cable network E!

Fly on the wall: Keeping Up With The Kardashians was a ratings winner right out of the gate when it premiered in October 2007 on cable network E!

A few months before the first episode was set to air, a sex tape featuring Kris' daughter was leaked, generating headlines and interest in the 27-year-old.

She had made the tape in 2002 with then boyfriend Ray J but the timing of its release five years later couldn't have been better timed. 

The publicity surrounding the sex tape considerably raised Kim's public profile; until then she was best known for being an assistant to Simple Life star and hotel heiress Paris Hilton. 

Timing: Kris Jenner masterminded the reality show and a few months before the first episode aired, a sex tape starring her daughter Kim was leaked, generating huge interest in the series

Timing: Kris Jenner masterminded the reality show and a few months before the first episode aired, a sex tape starring her daughter Kim was leaked, generating huge interest in the series

The E! series made global stars of Kim and her sisters Kourtney and as well as her half-sisters Kendall and Kylie Jenner. 

In the past 13 years, they have grown up on camera, sharing their life and loves, heartache and happiness, their changing faces and changing bodies, and the births of their own children.

More than that, though, they have taken TV fame and spun it into a huge money-making empire, with a lot of help from social media and some very clever marketing.

They mastered the art of keeping hundreds of millions of Twitter and Instagram users engaged with multiple posts a day and then found ways to make money from it.

They used their platforms to sell everything from makeup and perfume to waist trainers and underwear, while also striking lucrative endorsement deals and signing up for high-paid public appearances.  

Throughout it all, Kris has managed her children's careers, taking 10 percent of their earnings in addition to her own fees from the TV show and its spin-offs.

While KUWTK may be coming to an end after 20 seasons, there's no doubt we haven't heard the last of the momager, her kids and grandkids. 

Kylie Jenner - KUWTK made her a billionaire (well, almost) 

She is the youngest of Kris Jenner's six children but she's also now the richest.

Kylie Jenner, 23, is the youngest but richest of the KUWTK stars

Kylie Jenner, 23, is the youngest but richest of the KUWTK stars

Kylie, 23, made the cover of Forbes magazine in 2019 as the 'the world's youngest self-made billionaire' after she sold 51 percent of her Kylie Cosmetics company to giant Coty in a deal valued at $1.2 billion.

Forbes subsequently retracted the 'billionaire' title reckoning that, in reality, she was only worth an estimated $900 million.

Kylie's personal wealth came thanks mainly to her decision to start getting lip fillers when she was 18. And while she initially denied getting enhancements, she later acknowledged it and launched a collection of lip kits in 2015.

The following year, due to the tremendous success of her initial products, she launched Kylie Cosmetics. 

Kylie has also partnered with sister Kendall in a clothing line, founded her own skincare line, Kylie Skin, and released her own fragrance through half-sister 's KKW .  

- Game app, shapewear and products add up to $900 million

It can certainly be argued that without her sex tape, she and her family might never have achieved unimaginable wealth.

But while Superstar raised her profile, Kim, 39, made

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