When a beloved actor or musician passes away, they always leave behind that lingering thought of what they might have been able to create if they'd only had a little more time. However, as John Lennon's posthumous chart success has shown, for the stars of the future, death doesn't need to be the final curtain call. From actors making ghostly returns to the screen or famous figures narrating the story of their own lives, AI is reviving more than just celebs' careers. But when stardom doesn't end with death, who gets the final say on a celebrity's legacy? Here, MailOnline reveals how these creepy technologies are bringing back your favourite figures from the past to perform again.

Ediaf Piaf's rich tones will once again delight music fans as she stars in her own biopic - despite having passed away over 60 years ago. An AI recreation of Piaf's unmistakable voice will be used to narrate'Piaf', an upcoming film about her tumultuous life. Scientists from Warner Music Group have trained an AI on hundreds of recordings of Piaf, some over 80 years old, in order to'revive' Piaf's voice and image. Animation will be used alongside archival footage to tell the story of how Piaf rose to become an icon, including some previously unknown aspects. Julie Veille, who conceived the idea for the film, says that this will'help bring her story into the 21st century.' 'Piaf' will be a 90-minute film about the life of Edith Piaf and will be narrated by an AI reconstruction of the singer's voice The film, 'Piaf', will feature animation as well as archival footage of interviews, performances, and personal footage to tell the story of one of France's most iconic musicians Vielle said: 'It has been the greatest privilege to work alongside Edith's Estate.