Riley Keough was joined by grandmother Priscilla Presley during a recent trip to Graceland in honor of her mother, Lisa Marie Prelsey. In support of Lisa Marie’s posthumously released memoir, From Here to The Great Unknown,

Priscilla Presley made a surprise appearance at Graceland, joining granddaughter Riley Keough to celebrate the release of Lisa Marie's memoir.

From Lisa Marie's grief over Elvis' death, to freezing her late son Benjamin Keough's body, nothing was off limits in the posthumous tell-all.