Jason K. Ralph General Hastings 'Pug' Ismay Actor Christian McKay Winston Churchill Actor Ethan Saunders William Browne-Clayton Actor Pierre Van Heerden Ernst Putzi Hanfstaengl Actor Erica Wessels Clementine Churchill Actor Aubrey Shelton Lord Edward Halifax Actor Matthew Du Bois Reporter #1 Actor Sara Bernstein Executive Producer Sara Enright Executive Producer Brian Grazer Executive Producer Ron Howard Executive Producer Justin Wilkes Executive Producer Malcolm Venville Executive Producer, Director Frederick Rendina Writer