---
name: "Mariko Montpetit"
canonical: "https://film.one/person/mariko-montpetit"
fi1m_id: "mariko-montpetit"
imdb_id: "nm1628858"
tmdb_id: 1349433
roles: ["Editor"]
reviewed_on_fi1m: 2
average_fi1m_score: 85
average_over: 2
updated: "2026-10-03T03:21:29.960589+00:00"
licence: "© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL."
---

# Mariko Montpetit

## Identity

Mariko Montpetit

- **Canonical:** https://film.one/person/mariko-montpetit
- **Type:** Person
- **Fi1m ID:** mariko-montpetit
- **IMDb ID:** nm1628858
- **TMDB ID:** 1349433
- **Same entity:** https://www.imdb.com/name/nm1628858/, https://www.themoviedb.org/person/1349433

Editor. Born in Montreal, Quebec, Canada.

## Details

- **Work:** Editor
- **Active:** 2012–present
- **Fi1m score by decade:** 2010s 88 (1), 2020s 82 (1)
- **Elsewhere:** https://www.imdb.com/name/nm1628858/, https://www.themoviedb.org/person/1349433

## Streaming the US now

- **The Roku Channel:** [*The Act of Killing*](https://film.one/film/the-act-of-killing.md) (88)

For United States; add `?region=XX` for another country.

## Biography

Mariko Montpetit is a film editor. She worked on Joshua Oppenheimer’s *The Act of Killing* (2012) as one of the editors, having prepared media and edited scenes from 2009 to 2011.

She has also served as assistant editor on *The Look of Silence* (2014) and as editor or co-editor on *Sisters with Transistors* (2020), *Other, Like Me* (2020) and *Black Box Diaries* (2024). Montpetit, based in London, has contributed to several artists’ films and documentaries.

*Sources: mandy.com, dfi.dk, en.wikipedia.org, moviemeter.nl.*

## On Fi1m (2)

- *Black Box Diaries* (2024), Fi1m 82, Co-Editor — [page](https://film.one/film/black-box-diaries.md)
- *The Act of Killing* (2012), Fi1m 88, Editor — [page](https://film.one/film/the-act-of-killing.md)

## Complete filmography (8)

Every credit, newest first. Titles without a page can be requested for review on the HTML page.

- *The Thin Air Between* (2026), Editor
- *Black Box Diaries* (2024), Co-Editor — Fi1m 82, [page](https://film.one/film/black-box-diaries.md)
- *Sisters with Transistors* (2021), Editor
- *Other, Like Me* (2020), Editor
- *INFINITY minus Infinity* (2019), Editor
- *Transfinite* (2019), Editor
- *Listening in the Dark* (2018), Editor
- *The Act of Killing* (2012), Editor — Fi1m 88, [page](https://film.one/film/the-act-of-killing.md)

---
© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL. Canonical: https://film.one/person/mariko-montpetit