Rob Kardashian and his former fiancée Blac Chyna's upcoming reality show hasn't even premiered — and it's already facing the ax!

The series has tested low with audiences, and sources reveal exclusively to Life & Style that their wedding special is also at risk of being canceled.

MUST SEE: Kardashian Throwback Photos — See Kim and the Rest of the Gang Before They Were Famous!

"People are not as interested in Rob & Chyna as the network had hoped," the source says. "The network hasn’t agreed to a wedding special yet."

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However, E! execs are blaming the lack of drama on Kris Jenner, who refuses to allow Chyna's mom, Shalana Jones-Hunter, aka Tokyo Toni, to appear on the show.

MUST SEE: Rob Kardashian Calls Blac Chyna a "Psycho B—h" Just Days Before Split Rumors — Watch!

"Kris wants no part of a ‘feuding mother-in-laws’ story line,” explains the source.

For more Kardashian news, grab the latest issue of Life & Style, on newsstands now! And for a look back at Rob and Chyna's whirlwind romance, check out the gallery below.