How authentic is Keeping Up With the Kardashians? According to a new book about the famous fam, not at all!

In Kardashian Dynasty: The Controversial Rise of America's Royal Family, written by Ian Halperin, it's revealed that each episode of the long-running reality show is planned out ahead of time.

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Kim and Kourtney Kardashian filming an episode in 2012.

"There is a rough outline of the premise produced in advance — including a 'main plot and subplot' — with ideas sometimes contributed by Kris Jenner, sometimes by other family members, and other times by the producers," Halperin writes in an excerpt obtained exclusively by Life & Style.

"Then the cameras are turned on, the family performs, some scenes are reshot, and hours of footage are condensed in the editing room to produce each show."

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Since Season 1, there have been countless examples of the clan faking confrontations or conversations, which was discussed extensively during Kim Kardashian and Kris Humphries' divorce proceedings.

In a 165-page deposition obtained by Life & Style, executive producer Russell Jay admitted that at least two of the scenes portraying Kris in a negative light were "scripted, reshot or edited."

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Kim and Kris Humphries in 2011.

And though Kim claims to have been surprised by his proposal, Jay acknowledged that the 35-year-old knew her basketball player beau was going to pop the question on camera.

But one of the book's biggest revelations has to be Kim's use of a "tear stick" in order to cry on camera. So much for being the queen of meltdowns!

Kardashian Dynasty: The Controversial Rise of America’s Royal Family will be available for purchase on April 19.