GOODBYE CHRISTOPHER ROBIN gives a rare glimpse into the relationship between beloved children’s author A. A. Milne (Domhnall Gleeson) and his son Christopher Robin (Will TIlston), whose toys inspired the magical world of Winnie-the-Pooh. Will Tilston as ‘Christopher Robin Milne’ in the film UNTITLED A.A. MILNE. Photo by David Appleby.…