John Krasinski and Natalie Portman have been tapped to join the cast of Guy Ritchie’s ‘Fountain of Youth.’

The feature will follow two estranged siblings (Krasinski and 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.

James Vanderbilt has penned the story which Ritchie will direct. It will be produced by Skydance’s David Ellison, Dana Goldberg and Don Granger. Tripp Vinson will produce through his Vinson Films as will Project X Entertainment, with Vanderbilt, William Sherak, and Paul Neinstein producing for the company. Ritchie & Ivan Atkinson and Jake Myers also are producing with Radio Silence (Matt Bettinelli-Olpin, Tyler Gillett and Chad Villella) serving as executive producers.

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Skydance Media will serve as the studio, and the film will be produced for Apple by Skydance, Vinson Films and Project X Entertainment.

Filming is planned to begin in the first quarter of 2024.

Krasinski is currently in post-production on ‘IF’ for Paramount, which he wrote, directed, produced and stars in. Portman is currently starring in ‘May December’ from director Todd Haynes alongside Julianna Moore.