They call the dog Blue/Blue Dog in the film. Blue/Bluey is Australian slang for a red head.
Jason Isaacs once played Hook/Mr. Darling in Peter Pan (2003) and Levi Miller recently played Peter Pan in Pan (2015).
During ending credits, home movies are seen showing Michael Carter and his family getting a new puppy.
Nicholas Hamilton (Captain Fantastic (2016), Strangerland (2015)) auditioned for the role of 'Mick'.