More casting announcements for Guy Ritchie’s film: according to Deadline, Domhnall Gleeson has joined the cast of Fountain of Youth. Also starring John Krasinski and Natalie, the film will be produced for Apple by Skydance, Vinson Films and Project X Entertainment.

Written by James Vanderbilt, the pic follows 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.

As we said last week, the plan is to shoot during the first quarter this year, so presumably we’ll have more news on the project soon…