Lisa Marie Presley's twin daughters celebrate milestone 16th birthday — sister Riley Keough shares never-before-seen photos
as well as: "They’re so lucky to have you. Happy birthday girlies!" MORE: Priscilla Presley breaks silence on granddaughter ...
Priscilla Presley Celebrates 79th Birthday with Granddaughter Riley Keough in Photos Shared by Her Son
Priscilla could be seen posing with her late daughter Lisa Marie's kids Riley Keough and Harper ... along with the words ...