AceShowbiz - Amidst the release of their late mother's posthumous memoir, Harper and Finley Presley, the twin daughters of the late Lisa Marie Presley, celebrated their 16th birthday with heartwarming photos and a special tribute from their older sister, Riley Keough.

On Monday, Harper and Finley celebrated their milestone 16th birthday, sharing photos of the momentous day on their Instagram pages and receiving a sweet tribute from Riley Keough. The festivities came amidst the official release of Lisa Marie's posthumous memoir, "From Here To The Great Unknown", which sheds light on her addiction struggles and the profound impact her son Benjamin's death had on her.

Harper shared an image of herself outside on a restaurant deck with the scenic ocean in the background, captioning it "sweet sixteen." Meanwhile, Finley posted a series of photos from the same location, including one in a fitted black dress with a Louis Vuitton purse.

Riley took to Instagram to share a series of throwback and current photos with her younger sisters, expressing her love and admiration. "Happy Sweet 16 to my angel girls," she wrote. "You are the most special girls in the whole wide world. I am so lucky to be your big sissy."

The photos included a selfie of Riley and her sisters alongside their late brother Benjamin, who passed away in 2020. Another captured the quartet posing on a couch with their late mother.