Guy Ritchie's new film, modelled after the Indiana Jones and National Treasure movies, is an unevenly paced and unenthusiastically acted letdown.

How, when, and where you can watch Fountain of Youth, the new film from Guy Ritchie starring Natalie Portman and John Krasinski.

At least, that’s what Luke is hoping for when he shows up unannounced after a year of no contact. In the span of an afternoon, Luke’s antics cause Charlotte to lose her job and, nearly, custody of her 11-year-old son Thomas.

Krasinski and Natalie Portman play siblings in the adventure film, which also features a real-life family tie.

Natalie Portman embraced her little black dress moment at the New York City premiere of Apple’s “Fountain of Youth” on Monday night. The premiere featured Portman’s costars, including John Krasinski, who gathered at the American Museum of Natural History for the special screening.