The best secrets are the hardest to find.br br John Krasinski, Natalie Portman, Eiza González and Domhnall Gleeson star in Fountain of Youth – Premiering May 23 on Apple TV+ br Fountain of Youth follows two estranged siblings (John Krasinski and Academy Award winner Natalie Portman) who partner on a global heist to find the mythological Fountain of Youth. They must use their knowledge of history to follow clues on an epic adventure that will change their lives … and possibly lead to immortality.