As is the case with, well, pretty much everyone around the world, MARY POPPINS has long been a favorite Disney film of mine. I loved it as a child, shared it with my now-adult daughters, and it's the first live-action Disney movie I shared with my eldest grandson — who was immediately enchanted by the film though not quite three years old at the time. 

Because of my affection for MARY POPPINS, I looked forward to SAVING MR. BANKS from the moment I'd heard about the film. I had the good fortune of attending...