In the rare photos, the newly minted 16-year-olds can be seen wearing hats and sunglasses at a restaurant, sticking their tongues out, posing with Keough in New York City, smiling

Riley Keough celebrated her younger twin sisters Finley and Harper Lockwood's 16th birthday with a sweet tribute on Instagram Oct. 7.

Riley Keough marked sisters Finley and Harper’s 16th birthday on social media with a heartfelt post complete with throwback photos

Lisa Marie Presley's twin daughters Harper and Finley marked their milestone 16th birthday, and their older sister Riley Keough shared rare family photos in their honor

Elvis Presley's granddaughter, Riley Keough, revealed that her late mother, Lisa Marie Presley, had an eerie feeling when she said goodnight to the rock legend the night before his death.