Is Kris Jenner an alcoholic?

In a new tell-all, Kardashian Dynasty: The Controversial Rise of America’s Royal Family, author Ian Halperin details how the "momager" turned to booze during her ex-husband Caitlyn Jenner’s gender transition last year.

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Kris and Caitlyn Jenner.

"More credible are reports that Kris has been using alcohol to get over her apparent humiliation from Caitlyn's public revelations — and the fact that her ex has been hogging the spotlight that had once been reserved for Kardashians,” he writes in an excerpt exclusively obtained by In Touch. “Kris' younger sister, Karen Houghton, had in fact implied as far back as the spring of 2014 that Kris was hitting the bottle heavily after her separation from [Caitlyn, formerly known as] Bruce.”

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Ian adds there is “concern for Kris’ relationship with alcohol,” and that her father, Robert, passed away in Mexico a few years back due to drunk driving.

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"'Back in the day Kris was quite the party girl,' an LA hairstylist named Stella Fagan told me, recalling that she had styled Kris' hair a number of times while she was still married to Robert [Kardashian],” he states.

"[According to Fagan], sometimes she reeked of alcohol when she came in to get her hair done. She was young. She was wild. Nothing like the all-American mom Kris Jenner we see on TV today.”

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