Director Guy Ritchie keeps the treasure hunting at a nimble pace even if John Krasinski and Natalie Portman fail to boost the charm of a pair of bickering siblings.

Domhnall Gleeson, Eiza Gonzalez and Stanley Tucci co-star in a film about a brother and sister searching for the titular mythological spring.

On paper, Apple TV+’s Fountain of Youth seems like a fun idea: a mix of National Treasure and The Mummy with a bickering John Krasinski and Natalie Portman as brother-and-sister tomb raiders. That right there — the sibling connection instead of typical on-again/off-again partners in romance — is proof that at some point during this film’s gestation,