David Corenswet's Superman will have an "older-sibling dynamic" with Milly Alcock's Supergirl.
The 32-year-old actor is reprising his role as Clark Kent - AKA Kal-El - for the upcoming DC Studios blockbuster with Alcock, 25, stepping into the title role for the film and director Craig Gillespie has offered a hint of what to expect from their on-screen dynamic.