When Paul Schrader first approached Amanda Seyfried, he was surprised to find that she was pregnant. When she expressed interest in the project, he wrote her pregnancy into the script.
Writer/director Paul Schrader stated in a Q&A at the Rotterdam Film Festival 2018 that he was surprised while editing the film to notice how many similarities there were with Taxi Driver (1976), a film he also wrote.
Shot in 20 days on a $3.5m budget.
Unusually shot in 4:3 ratio. Paul Schrader was inspired to shoot this way by Pawel Pawlikowski's Ida (2013) as he liked the way it framed the human body. Schrader also liked the sense of claustrophobia that the framing suggests.