Ryan Gosling ’s newest costar is high-maintenance, had an entourage around him at all times and required his own wardrobe department on set.

‘Project Hail Mary,' directed by Phil Lord and Christopher Miller, released in theatres on 26 March and stars Ryan Gosling, Sandra Hüller, James Ortiz, Lionel Boyce, and Ken Leung.

What anchors the story is not the science but the beauty behind the unlikely friendship between Grace and Rocky — an alien from a distant planet named Erid, who, like Grace, is also on a mission to sa...