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.

During a conversation with Oprah, Riley Keough reflected on her family’s legacy, sharing memories of her mother Lisa Marie Presley and her late grandfather Elvis, including Lisa’s recollections of Elvis’s struggles and her tragic final memories of him when she was just nine.

In her posthumous memoir 'From Here to the Great Unknown,' Lisa Marie Presley opened up about her whirlwind relationship and marriage with Michael Jackson, who told her he was "still a virgin" when they first got together romantically.