In addition to the release date, Jam City announced that the mobile game will also have six actors from the main Harry Potter films reprise their roles within Hogwarts Mystery. The actors providing voice work for the game include Dame Maggie Smith (Professor McGonagall), Michael Gambon (Professor Dumbledore), Warwick Davis (Professor Flitwick), Sally Mortemore (Madam Irma Pince), Gemma Jones (Madam Pomfrey), and Zoe Wanamaker (Madam Hooch).
"Our goal with Harry Potter: Hogwarts Mystery is to make players really feel for the first time like they’re attending Hogwarts,” said Chris DeWolfe, co-founder and CEO of Jam City. “By including these iconic and incredibly talented actors in the game, we come one step closer to truly giving fans their own Hogwarts experience.”In terms of story specifics, Jam City has said that Hogwarts Mystery is set in the 1980s, after Harry Potter is born but before he enrolls at Hogwarts. Jam City has worked on bringing other popular franchises to mobile before, including the development of "Futurama: Worlds of Tomorrow" with the show's original writers, animators, and cast members.
Another mobile game set in the Harry Potter universe is also in the works at Niantic, called "Harry Potter: Wizards Unite" and previously reported to launch in 2018. Niantic's game is said to be "significantly influenced" by its previous success with Pokémon Go, allowing players to explore their real world neighborhoods and cities in an effort to discover, fight, and capture the Harry Potter series' fantastic beasts.