The official reveal trailer was narrated by Jim Dale, whom provided the voice for the US version of the audio books for the original series. Dale also narrated several earlier Harry Potter video games.
One of the side missions is called "Follow The Butterflies". In "Harry Potter and The Chamber Of Secrets", Ron asks why it had to be to follow the spiders and why not follow the butterflies.
Located behind the groundskeepers hut is a headstone with the Gryffindor house crest on it. This was placed there by the developers to honor the late Robbie Coltrane who portrayed Hagrid in the Harry Potter movies. Hagrid was sorted into Gryffindor.
Generated $1 billion in revenue within three months of release.
Luke Youngblood was in the original Harry Potter movies as "Lee Jordan" and here he is a voice actor for multiple characters.