Director Rose Glass won the IWC Schaffhausen Filmmaker Bursary Award for this, which was presented to her by Danny Boyle.

Originally shot in the taller than normal 1.66:1 aspect ratio, as director Rose Glass wanted more space and headroom around the characters. It was re-framed in post-production to widescreen 2.39:1, with a few shots extended horizontally with VFX.

Maud's eyes are two different colors: one blue/green and one brown. However, the actress Morfydd Clark has only blue eyes.

Morfydd Clark starred in Pride and Prejudice and Zombies (2016), and co-star Jennifer Ehle starred in the BBC series Pride and Prejudice (1995).

Despite being a film revolving around religion and Christianity, no passage or verse from the bible is ever recited.

When God speaks to Maud, he is voiced by Morfydd Clark (Maud) speaking Welsh and pitched down a few levels.