Riley Keough offered fans a rare glimpse into her personal life as she celebrated the 16th birthday of her twin sisters, Finley and Harper Lockwood.

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

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

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.

Following her mother Lisa Marie Presley's death, Keough was named as the sole trustee of Lisa Marie Presley's estate which includes Graceland. Lisa Marie Presley, the only child of Elvis Presley, died Jan. 12 at the age of 54.

Elvis Presley, the King of Rock and Roll, died unexpectedly in August 1977 at his Graceland estate at the age of 42. While the world was devastated by the sudden loss, Lisa Marie, who was just nine years old at the time, had a feeling that her father's days were numbered.