There were so many times that I found him down on the floor or unable to control his body very well,” Lisa Marie Presley writes of her father, Elvis, in her posthumous new memoir.

Lisa Marie Presley's raw memoir "From Here to the Great Unknown" is out now. Ahead of Oprah's Riley Keough interview, these are the biggest reveals.

Riley Keough has unveiled a heartbreaking letter written by her late mother, Lisa Marie Presley, in which she begged her father Elvis not to die. Elvis Presley, who died in 1977 aged just 42, suffered with health problems in his later life – his daughter Lisa Marie was only nine years old at the time of his death.