Elvis fans are expected to descend on a London bookshop on Wednesday to catch a glimpse of the King's former wife.
Elvis met Priscilla when she was 14
Priscilla Presley, who was married to Elvis for six years, will be at Waterstones, in Oxford Street, central London, to sign copies of a new book.
It claims to reveal the inside story of Elvis Presley's life in the voices of Priscilla, their daughter Lisa Marie and other family members.
The signing is the first in a string of public appearances by Ms Presley.
The actress, who starred in the Naked Gun comedies, is due to appear on BBC's Friday Night with Jonathan Ross, as well as Richard and Judy on Channel 4 and ITV1's This Morning.
The book includes interviews with Priscilla and Lisa Marie, as well as a collection of personal photographs, memorabilia and handwritten notes.
Elvis met Priscilla, the daughter of a military man who served in Germany at the same time as Presley, when she was just 14.
She moved into Graceland mansion in Memphis, Tennessee, and eventually married in Las Vegas in 1967 at the age of 21.
They had their daughter, Lisa Marie, before the relationship broke down following allegations of infidelity and drug abuse. They divorced in 1973.