Twice Upon A Time is a four-part French sci-fi drama miniseries first broadcast in 2019, directed by Guillaume Nicloux, starring Gaspard Ulliel and Freya Mavor. The miniseries was broadcast in France via the network Arte on 29 August 2019. It was released in the United States on Netflix on 19 December 2019. Twice Upon A Time was the second collaboration between director Guillaume Nicloux and actor Gaspard Ulliel, the first was the 2018 war film To the Ends of the World.

Gaspard Thomas Ulliel was a French actor. He was known for having portrayed the young Hannibal Lecter in Hannibal Rising (2007), fashion designer Yves Saint Laurent in the biopic Saint Laurent (2014), and for being the face of Chanel men's fragrance Bleu de Chanel for twelve years. He also voiced Jack Frost in the French version of Rise of the Guardians (2012), and portrayed Anton Mogart in the Disney+ miniseries Moon Knight (2022).