Kendall Jenner and Kylie Jenner have grown up in the spotlight due to leaked sex tape of their older sister Kim Kardashian leading to a reality TV show.  However, viewership of "Keeping Up With The Kardashians" is at its lowest, and it looks like the Jenner girls will be continuing the family cash flow.

"The Jenner girls are being groomed to become their own brand, under the Jenner name. While of course they are playing up to the Kardashian family ties, they are different brands than the [older three sisters]," Ronn Torossian, CEO of 5WPR and author of "For Immediate Release," told FOX411.

"While the Kardashian sisters are all committed, with Kanye West in the picture and perhaps a divorce [in] the cards for Khloe and Lamar Odom, the older sisters are fading from the spotlight quickly," Torossian added.

According to FOX News, Kris Jenner is reportedly pulling the strings in her youngest daughters' future success.  The Kardashian martriach has everything allegedly planned out to create a "multimillion-dollar" empire using Kendall and Kylie. 

"At this point, it is certainly working for Kylie and Kendall, they are both relevant because they are becoming household names," Torossian said. "But based on their current trajectory, the Jenner girls are being positioned to have a long-term career. Let's not forget, their dad Bruce was a celebrity many years ago and Kim is a brilliant marketer and has a great brand. The Jenner girls would be wise to pay attention to their sisters' career paths."

However, some critics say Kendall and Kylie don't have what it takes to become as big as their big sister Kim Kardashian.  The girls are valued to have a net worth of about $2 million.

"We've seen again and again how many brands on a [downward] slope in popularity introduce new products. Not all humans are brand dynasties - the Jenner girls' campaign is another attempt by queenmaker mom/manager Kris to hang on to the throne," Alex Shvarts, CEO of online branding agency Simply Mint, told FOX. "They will need individuality and ongoing marketing. The blitz and fluff will subside soon enough, and if by then the Jenner girls have not built a core solid audience, they will disappear as quickly as they appeared."