
Sian Thomas
- Known for
- Acting
- Born
- September 20, 1953
- Birthplace
- Stratford-on-Avon, Warwickshire, England, UK
Siân Thomas – British actress of Welsh heritage, born 20 September 1953 in Stratford-upon-Avon, Warwickshire, England. Trained at the Central School of Speech and Drama, sister of actress Sara Mair-Thomas, and long-time partner of the poet Tony Harrison (died 2025). A distinguished stage actress with credits at the Royal Shakespeare Company, National Theatre, and West End, including an Olivier Award nomination for Up for Grabs (2002) and an Off West End Award nomination for The Cherry Orchard (2017). Her most notable film roles include Thorhild the Sarcastic in Erik the Viking (1989), Lady Darlington in Vanity Fair (2004), Madame Gaillard in Perfume: The Story of a Murderer (2006), Amelia Bones in Harry Potter and the Order of the Phoenix (2007), Edith May in War Machine (2017), and Lilly in Finding Your Feet (2018). On television she has appeared in Wide-Eyed and Legless (1993), The Worst Week of My Life (2005), The Ruby in the Smoke (2006), Midsomer Murders (2006), Merlin (2009), Atlantis (2013), New Tricks (2014), Doc Martin (2019), and Under Milk Wood (2014). She is also known for her poetry readings on BBC Radio 3 and audiobook work.
Filmography

22+1 2025
as Nurse

Widow's Walk 2019
as additional voice

The Conductor 2018
as Mother Frank

Finding Your Feet 2017
as Lilly Glover

War Machine 2017
as Edith May

Shooting Clerks 2016
as Jason's Lady Friend

ID2: Shadwell Army 2016
Costume Design

Under Milk Wood 2014
as Mrs. Dai Bread Two
- Perestroika: Reconstructed
Perestroika: Reconstructed 2013
Actor

Half Broken Things 2007
as Shelley

Harry Potter and the Order of the Phoenix 2007
as Amelia Bones

Dangerous Liaisons 2007
as Annie

The Ruby in the Smoke 2006
as Mrs Rees

Perfume: The Story of a Murderer 2006
as Madame Gaillard

Vanity Fair 2004
as Lady Darlington
- Sredni Vashtar
Sredni Vashtar 2003
as The Aunt

A Mind to Murder 1995
as Dr. Saxon

Othello 1994
as Desdemona (voice)

Rose Red 1994
as Clare Marvel

Wide-Eyed and Legless 1993
as Aileen Armitage

Frankenstein's Baby 1990
as Judith Cole

Erik the Viking 1989
as Thorhild the Sarcastic

Prick Up Your Ears 1987
as Marilyn Orton
Credits from TMDB.