Cliff’s review published on Letterboxd:
Even if you can predict how the story's going to pan out, director Fabrice du Welz and writer Romain Protat take you on that journey in such a constantly surprising way that it's a stunning watch regardless. Honestly, almost every scene contains at least one surprise, whether it's a character's unexpected action or reaction, or a stop-you-in-your-tracks cinematic technique.
So if you like the sound of a Belgian romantic thriller horror fantasy done in a (mostly) social-realist style, with the occasional amazing music cue as an added bonus, then don't read any more about Alléluia, and just watch it.
As I write this, it's currently sitting at No.14 on my Best Horror Films of the 21st Century list, between Kill List and The Strange Colour of Your Body's Tears - that's how good this is.