---
name: "Gethin Alderman"
canonical: "https://film.one/person/gethin-alderman"
fi1m_id: "gethin-alderman"
imdb_id: "nm3575759"
tmdb_id: 2808717
roles: []
reviewed_on_fi1m: 2
average_fi1m_score: 74
average_over: 2
updated: "2026-10-07T19:46:28.741629+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."
---

# Gethin Alderman

## Identity

Gethin Alderman

- **Canonical:** https://film.one/person/gethin-alderman
- **Type:** Person
- **Fi1m ID:** gethin-alderman
- **IMDb ID:** nm3575759
- **TMDB ID:** 2808717
- **Same entity:** https://www.imdb.com/name/nm3575759/, https://www.themoviedb.org/person/2808717

Actor.

## Details

- **Active:** 2020–present
- **Elsewhere:** https://www.imdb.com/name/nm3575759/, https://www.themoviedb.org/person/2808717

## Streaming the US now

- **Disney+:** [*Somewhere Boy*](https://film.one/tv/somewhere-boy.md) (85)

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

## Biography

Gethin Alderman is a Welsh actor, creature performer and movement specialist based in London. He trained at the Royal Central School of Speech and Drama and is multilingual, speaking Welsh, French, Spanish and English.

His screen credits include the Monster in the 2022 Channel 4 series *Somewhere Boy*, an Executive Officer in *Andor* (2022), a Party Guest in *Ammonite* (2020), The Shreek in *Doctor Who* (2025), Homo Aqua in *The War Between the Land and the Sea* (2025), Video Pap in *The Outlaws* (2021), Walther Nernst in *Einstein and the Bomb* (2024) and Minnet Kable in *Wolf* (2023). He has also appeared as Jean Pierre in *The Great* (2021–2023). On stage, he was nominated for an OffWest End Award for *Starcrossed* and performed his solo comedy show *Sublime* at the Brighton and Edinburgh Fringes in 2019.

*Sources: imdb.com, gethinalderman.com.*

## On Fi1m (2)

- *Somewhere Boy* (2022), Fi1m 85, as Monster — [page](https://film.one/tv/somewhere-boy.md)
- *Ammonite* (2020), Fi1m 64, as Party Guest — [page](https://film.one/film/ammonite.md)

## Complete filmography (9)

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

- *Othello* (2026), as Nicos
- *The War Between the Land and the Sea* (2025), series, as Homo Aqua
- *Doctor Who* (2024), series, as The Shreek
- *Einstein and the Bomb* (2024), as Walther Nernst
- *Wolf* (2023), series, as Minnet Kable
- *Somewhere Boy* (2022), series, as Monster — Fi1m 85, [page](https://film.one/tv/somewhere-boy.md)
- *Andor* (2022), series, as Executive Officer — Fi1m 86, [page](https://film.one/tv/andor.md)
- *The Outlaws* (2021), series, as Video Pap — Fi1m 67, [page](https://film.one/tv/the-outlaws.md)
- *Ammonite* (2020), as Party Guest — Fi1m 64, [page](https://film.one/film/ammonite.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/gethin-alderman