The sweet nickname was revealed in an excerpt from Presley’s posthumous memoir.

Neilson Barnard/Getty Images

Lisa Marie Presley had the sweetest nickname for her granddaughter Tupelo.

Elvis only child died at age 54 due to complications from a previous bariatric surgery.

Riley Keough and Lisa Marie Presley

Credit:Neilson Barnard/Getty Images

According to Random House,Presley asked for Keoughs help finishing the long-gestating memoirprior to her unexpected death.

Keough listened to countless hours of tape Presley had recorded to finish the book.

“This is one of the biggest privileges of the whole thing,” she said.

“Not everyone has a book to read about their grandparents.

Thats unique to our family.

And its really a gift.

Its funny because we picked her name before the Elvis movie, Keough explained.

I was like, Oh, no.

From Here to the Great Unknownwill be available on October 8.

Visit lisamariebook.com for more information.