---
name: "Osian Cai Dulais"
canonical: "https://film.one/person/osian-cai-dulais"
roles: ["Actor"]
reviewed_on_fi1m: 1
average_as: "actor"
average_over: 1
updated: "2026-09-17T07:29:26.687783+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."
---

# Osian Cai Dulais

Actor.

## Details

- **Work:** Actor
- **Elsewhere:** https://www.imdb.com/name/nm3582739/, https://www.themoviedb.org/person/1127671

## Streaming the US now

- **Amazon Prime Video:** [*Submarine*](https://film.one/film/submarine.md) (82)

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

## Biography

Osian Cai Dulais is a Welsh actor. He began performing on stage at the age of nine and has appeared in over twenty productions. His first professional credit came at the age of six in the short S4C film I Ffwrdd a ni.

Since 2007 he has worked regularly in film and television. Dulais played Twm Puw in the S4C series 2 Dy a ni across two series and appeared in the Welsh drama Pobol Y Cwm. He is known for portraying Mark Pritchard in the 2010 film Submarine. In 2012 he recorded an audiobook narration for Wait a Lonely Lifetime. He has also performed with local theatre groups in Carmarthen and collaborated with the Wales Millennium Centre and Theatre na n'Og.

*Sources: imdb.com, en.wikipedia.org.*

## On Fi1m (1)

- *Submarine* (2011), Fi1m 82, as Mark Pritchard — [page](https://film.one/film/submarine.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/osian-cai-dulais