# Siôn Daniel Young
**Siôn Daniel Young** (born 1989) is a Welsh stage, television, and film actor from Cardiff whose work spans Welsh-language theater, West End productions, and British television drama. He is known for playing Gabriel in the [BBC One](https://www.edgepedia.org/bbc-one) series *[Lost Boys and Fairies](https://www.edgepedia.org/lost-boys-and-fairies)* (2024), for which he won the BAFTA Cymru Award for Best Actor in 2025, and for portraying Colin Stagg in [Channel 4](https://www.edgepedia.org/channel-4)'s *Deceit* (2021).[1](https://www.imdb.com/name/nm4592683/) • [2](https://www.broadwayworld.com/people/Sion-Daniel-Young/)
| Key fact | Detail |
|---|---|
| Born | 1989, Cardiff, Wales, UK[1](https://www.imdb.com/name/nm4592683/) |
| Training | Royal Conservatoire of Scotland; began performing at Welsh-language eisteddfodau[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/) |
| First professional role | Daf James's *Llwyth* (Tribe), the first Welsh-language play about gay characters written by a queer playwright[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/) |
| West End roles | Albert Narracott (replacement) in *War Horse* (2009 transfer); Christopher Boone (replacement) in *The Curious Incident of the Dog in the Night-Time* at the Gielgud Theatre[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/) |
| Breakthrough television role | Gabriel in *Lost Boys and Fairies* (BBC One, 2024), the broadcaster's first primetime gay adoption drama[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/) |
| Awards | BAFTA Cymru Award for Best Actor (2025) for *Lost Boys and Fairies*; BAFTA Cymru nomination for Best Actor for *The Left Behind*[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/) • [3](https://www.sueterryvoices.com/artist/sion-daniel-young) |
| Languages | Fluent Welsh speaker[3](https://www.sueterryvoices.com/artist/sion-daniel-young) |
## Early life and training
Young was born in Cardiff in 1989[1](https://www.imdb.com/name/nm4592683/). He began performing at Welsh-language eisteddfodau, the traditional Welsh festivals of literature, music, and performance, before training professionally at the [Royal Conservatoire of Scotland](https://www.edgepedia.org/royal-conservatoire-of-scotland)[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). He is a fluent Welsh speaker, and his voice work covers Welsh, South Wales, and neutral accents[3](https://www.sueterryvoices.com/artist/sion-daniel-young).
## Stage career
**Welsh theater beginnings.** Young's first professional role was in Daf James's *Llwyth* (Tribe), a landmark production as the first Welsh-language play about gay characters written by a queer playwright[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). He later joined the cast of Gary Owen's *Killology*, a co-production between the Royal Court Theatre London and Sherman Theatre, Cardiff[4](https://www.broadwayworld.com/westend/article/The-BWW-QA-WAR-HORSEs-Sion-Daniel-Young-20130314).
**West End work.** Young appeared at the National Theatre in *War Horse* and went on to play the lead role of Christopher Boone in the West End production of *The Curious Incident of the Dog in the Night-Time* at the Gielgud Theatre[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). His stage credits also include the world premiere of Barney Norris's *Nightfall* at the Bridge Theatre in 2018, and the role of slaughterman Ifan William in Ed Thomas's *On Bear Ridge*, presented by National Theatre Wales and the [Royal Court Theatre](https://www.edgepedia.org/royal-court-theatre) and reviewed at the Royal Court in October 2019[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). In a 2013 interview while playing Albert in *War Horse* at the New London Theatre, he described the role as the best job he had done[4](https://www.broadwayworld.com/westend/article/The-BWW-QA-WAR-HORSEs-Sion-Daniel-Young-20130314).
## Television and film
Young's early screen work includes the film *Private Peaceful* (2012), in which he played Pete Bovey, and the feature *Another Me* (2013)[1](https://www.imdb.com/name/nm4592683/). On television he appeared as Sapper Neary in *Our World War* (2014) and as Morgan Hopkins in the Welsh-language crime series *[Hinterland](https://www.edgepedia.org/hinterland-tv-series)* (*Y Gwyll*, 2015)[1](https://www.imdb.com/name/nm4592683/) • [5](https://www.tvmaze.com/people/57033/sion-daniel-young).
**Recognition in television film.** For playing Gethin, the lead role in the 2019 television film *The Left Behind*, Young drew considerable acclaim: he was nominated for a BAFTA Cymru award as Best Actor, and the film itself took home Best Single Drama honors from both BAFTA and the [Royal Television Society](https://www.edgepedia.org/royal-television-society)[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). He was also nominated for a Welsh BAFTA for his performance in *Deceit*[3](https://www.sueterryvoices.com/artist/sion-daniel-young).
**Later television roles.** In 2021, Young played Colin Stagg in *Deceit*, a four-part Channel 4 drama drawn from real events, telling of a honeytrap that became contentious and lay at the center of the 1992 police inquiry into the killing of a young mother in London, one of the most notorious miscarriages of justice in British legal history[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/) • [3](https://www.sueterryvoices.com/artist/sion-daniel-young). He played PC Ivan Barkas in *Witness Number 3* (2022) and Gareth in *Keeping Faith* (2020 to 2021)[1](https://www.imdb.com/name/nm4592683/). He appeared as Douglas in three episodes of the Apple TV+ spy series *Slow Horses* in 2023[1](https://www.imdb.com/name/nm4592683/) • [2](https://www.broadwayworld.com/people/Sion-Daniel-Young/), and played Lee Mace in the Cardiff-set BBC One series *The Guest* (2025)[1](https://www.imdb.com/name/nm4592683/) • [2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). He has also been the narrator of the series *Clean It, Fix It*, credited for 40 episodes[5](https://www.tvmaze.com/people/57033/sion-daniel-young), and has done voice work including Lorenzino de Medici in *The Medici: Bankers, Gangsters, Popes* (2023) and roles in the *Torchwood* podcast series[6](https://www.tvinsider.com/people/sion-daniel-young/) • [1](https://www.imdb.com/name/nm4592683/).
## Lost Boys and Fairies
In 2024, Young starred as Gabriel in the BBC One drama *Lost Boys and Fairies*, the broadcaster's first primetime gay adoption drama, written by Daf James, the playwright who had written his first professional stage role[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). His performance earned him the BAFTA Cymru Award for Best Actor in 2025[2](https://www.broadwayworld.com/people/Sion-Daniel-Young/). He also performed as a soundtrack singer on the series, on the songs "Where Do You Go To (My Lovely)" and "Lost Boys & Fairies"[1](https://www.imdb.com/name/nm4592683/). The drama was nominated for the 53rd International Emmy Awards in the TV Movie/Mini-Series category[3](https://www.sueterryvoices.com/artist/sion-daniel-young), and its release on BritBox was described as a tearjerker as much as a celebration of queer families[7](https://www.tellyvisions.org/tag/si-n-daniel-young/).
## References
1. [Sion Daniel Young, IMDb](https://www.imdb.com/name/nm4592683/)
2. [Sion Daniel Young (Actor) - Broadway & Theatre Credits, BroadwayWorld](https://www.broadwayworld.com/people/Sion-Daniel-Young/)
3. [Sion Daniel Young, Sue Terry Voices](https://www.sueterryvoices.com/artist/sion-daniel-young)
4. [The BWW Q&A: WAR HORSE's Sion Daniel Young!, BroadwayWorld (14 March 2013)](https://www.broadwayworld.com/westend/article/The-BWW-QA-WAR-HORSEs-Sion-Daniel-Young-20130314)
5. [Sion Daniel Young, TVmaze](https://www.tvmaze.com/people/57033/sion-daniel-young)
6. [Sion Daniel Young - Actor, TV Insider](https://www.tvinsider.com/people/sion-daniel-young/)
7. [Siôn Daniel Young, Telly Visions](https://www.tellyvisions.org/tag/si-n-daniel-young/)
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*Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Screen people and creators › Screen actors of the Anglosphere and Europe › Welsh actors*
*Initially written Sep 17, 2026 · Reviewed: Sep 30, 2026; Oct 25, 2026 · Edited: Sep 30, 2026; Oct 11, 2026; Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license