Jackie Kennedy’s Scary-Skinny Diet Secrets

Jacqueline Kennedy Onassis cut an iconic figure, and a new memoir from her one-time nanny and assistant explains how the original scary skinny goddess managed her weight — with a super-strict diet!

In “Jackie's Girl: My Life With The Kennedy Family,” Kathy McKeon recalls the tragic first lady as not much of a chow hound. "She never had much of an appetite," McKeon writes in the book. "And the toll of the horror she survived was plain to see on her painfully thin frame."

The book outlines a strikingly strict daily regimen for maintaining that impossibly lean-and-regal look still favored by such cultural heirs as Angelina Jolie, Kiera Knightley and England’s Princess Kate Middleton.  

With this exceedingly low-fat diet — which Kathy says Jackie recommended she adopt when she noticed her young charge putting on a few pounds — helped light the body-image torch for generations to come.

Count her daughter Caroline Kennedy among those still hefting that torch with a delicately rail-thin arm. "You're not going to order dessert, Caroline," Jackie O allegedly once sniped in a Paris restaurant, according to the 2007 book "American Legacy: The Story of John & Caroline Kennedy" by C. David Heymann. "You're much too fat. Nobody will ever want to marry you."

Caroline — whose marriage to Edwin Schlossberg is in its 30^th year, and who served as the United States Ambassador to Japan from 2013 to 2017 — would appear to have taken her mother’s advice.