Produced as an undergraduate project at York University, Miller worked with a fellow, Ezra Krybus on the film.

[24][25][26] In 2022, Miller wrote the screenplay for BlackBerry with Johnson, about the Canadian tech company formerly called Research in Motion.

[27] The film stars Glenn Howerton as Jim Balsillie, Jay Baruchel as Mike Lazaridis, and co-writer and director Matt Johnson as Doug Fregin.

[28] BlackBerry premiered in competition at the 73rd Berlin International Film Festival on February 17, 2023,[2] and attracted widespread critical acclaim.

[35] In 2013, during festival screenings of Operation Avalanche, Miller noted an evident gender imbalance in the film industry was vocal about his desire to change that.

[36] Later that year, Miller's production company Zapruder Films (which he co-founded with Johnson), launched a contest to back a first-time female screenwriter with $12,000 CAD in funding, story editor guidance, and script optioning.