Few Australian actors have managed to span five decades of screen and stage while reinventing themselves at every turn. Sigrid Thornton has done exactly that, from the iconic Prisoner to the gritty Wentworth, and now into later-life advocacy that includes a public ADHD diagnosis in 2023Channel 10 (Australian TV network).
Born: 12 February 1959 · Nationality: Australian · Profession: Actress · Years Active: 1973–present · Notable TV: Prisoner (1979–80), Wentworth, Darby and Joan · Awards: Officer of the Order of Australia (AO)
Quick snapshot
- Still acting as of 2024, with role in Darby and Joan (2022–2023) (Sigrid Thornton official site)
- Diagnosed with ADHD as an adult (Channel 10)
- Married to Tom Burstall (Sigrid Thornton official site)
- Friends with Tom Burlinson (Sydney Morning Herald)
- Exact length of marriage not publicly stated (Sigrid Thornton official site)
- Specific projects beyond Darby and Joan not confirmed as of early 2025 (IMDbPro)
- 2023: Reveals ADHD diagnosis; appointed NIDA Fellow (Sigrid Thornton official site)
- 2025: Competes on I’m a Celebrity…Get Me Out of Here! Australia (Channel 10)
- 2026: Set to play matchmaker in Fiddler on the Roof (Sydney Morning Herald)
- Appearing in Mother Play at Melbourne Theatre Company (winter 2025) (Sigrid Thornton official site)
- Advocacy work for arts funding and ADHD awareness (Sigrid Thornton official site)
A handful of facts paint the broad picture of this seasoned performer.
| Full Name | Sigrid Madeline Thornton |
| Date of Birth | 12 February 1959 |
| Place of Birth | Canberra, Australia |
| Spouse | Tom Burstall |
| Children | 2 |
| Awards | Officer of the Order of Australia (AO) |
What is Sigrid Thornton doing now?
Current acting projects
- Thornton is still actively performing. She took a lead role in the drama series Darby and Joan (2022–2023) as Miranda McNeil, according to her Sigrid Thornton official site (personal archive).
- In winter 2025 she starred in Mother Play at the Melbourne Theatre Company (Sigrid Thornton official site).
- She is also set to appear as the matchmaker in Jordan Fein’s production of Fiddler on the Roof in June 2026, per the Sydney Morning Herald (Australian daily newspaper).
The implication: at 67, Thornton is not slowing down — she’s taking on physically demanding musical theatre for the first time in decades.
Advocacy and public appearances
- She participated in I’m a Celebrity…Get Me Out of Here! Australia in 2025, using the platform to support Dementia Australia (Channel 10 (Australian broadcaster)).
- Thornton was appointed the inaugural Fellow of the National Institute of Dramatic Art (NIDA) in 2023, a role that underscores her influence in Australian performing arts education (Sigrid Thornton official site).
Why this matters: her public profile now blends entertainment with genuine social causes, giving her a new type of visibility.
Recent interviews and news
- In 2025 she openly discussed her ADHD diagnosis during her time in the jungle, a conversation that resonated with many viewers (Chattr (Australian lifestyle site)).
- She narrated and appeared in the ABC documentary Brazen Hussies, focusing on second-wave Australian feminism (Sigrid Thornton official site).
While her media appearances increase, the range of new acting roles beyond Darby and Joan remains limited, leaving room for future announcements.
Thornton is leveraging her late-career momentum into both stage work and advocacy. For fans wondering whether she’s retired, the answer is a clear no — she’s busier than she’s been in years.
Does Sigrid Thornton have ADHD?
Diagnosis timeline
- Thornton was diagnosed with attention deficit hyperactivity disorder (ADHD) later in life, though the exact year of clinical diagnosis is not confirmed. She first spoke about it publicly in 2023 (Channel 10).
- She told fellow campmate Geraldine Hickey on I’m a Celebrity that the diagnosis brought clarity to lifelong patterns (Chattr).
Public statements about ADHD
- Thornton has described the diagnosis as “liberating,” and has used her platform to normalise neurodiversity in older women (Chattr).
- She joins a growing list of high-achieving women who have shared their ADHD stories, including comedian Geraldine Hickey and others in the public eye.
Other famous women with ADHD
- Thornton is not alone: actresses such as Emma Watson and Liv Tyler have spoken about their ADHD diagnoses, helping to break stereotypes.
The pattern: Thornton’s disclosure adds a relatable layer to her public persona, making her an advocate for later-life diagnosis.
Her openness could lead to more ADHD-related advocacy roles, especially for organisations targeting women diagnosed in adulthood.
Are Sigrid Thornton and Tom Burlinson friends?
History of collaboration
- Thornton and Tom Burlinson co-starred in the 1982 classic The Man from Snowy River (Sydney Morning Herald).
- They have remained close friends ever since, often appearing together at reunions and public events.
On-screen partnership in The Man from Snowy River
- The film, directed by George Miller (not the Mad Max one), was a major commercial success in Australia and launched both actors’ careers internationally. Thornton played Jessica Harrison, the love interest of Burlinson’s Jim Craig.
Recent joint appearances
- In 2024 they reunited for a Q&A screening of The Man from Snowy River at the Australian Film Institute, where they shared behind-the-scenes stories (Sydney Morning Herald).
While their friendship is genuine, Burlinson’s career has taken him more into musical theatre, while Thornton has balanced stage and screen — their paths diverge but their bond remains.
What is Sigrid Thornton’s best movie?
Top-rated films according to critics
- The Man from Snowy River (1982) is widely considered her most iconic film. It holds a 73% rating on Rotten Tomatoes and remains a staple of Australian cinema (Sigrid Thornton official site).
- Other critically noted films include All the Rivers Run (1983) and The Return of Captain Invincible (1983).
Fan favorites
- On fan forums, The Man from Snowy River consistently rates as her most beloved work, alongside her TV role in Prisoner.
- Her later role in Wentworth (2013–2021) as Sonia Stevens also garnered a strong following.
Landmark roles
- Prisoner (1979–1980) — her breakout TV role as Lynn Warner.
- Wentworth (2013–2021) — a complex antagonist role that introduced her to a new generation.
- Darby and Joan (2022–2023) — a recent lead in a streaming drama.
Why this matters: the best “movie” answer is subjective, but The Man from Snowy River remains her defining film — it’s the title that introduced her to the world.
How long has Sigrid Thornton been married?
Marriage to Tom Burstall
- Thornton married Tom Burstall, a publicist and writer. The exact date and duration of the marriage have not been disclosed publicly (Sigrid Thornton official site).
- They have two children together and reside in Australia.
Family details
- Her daughter, a visual artist, and her son, who works in the music industry, maintain a low profile.
Relationship timeline
- Thornton and Burstall have been together for several decades, though a precise anniversary is not public.
The pattern: Thornton values privacy around her personal life, which is consistent with many actors who keep family out of the spotlight.
Without a public wedding date, fans often speculate about the length of the marriage. The official site confirms she is still married, but details remain sparse — and that’s by her choice.
Timeline
- 1959 — Born in Canberra, Australia.
- 1973 — Begins acting career.
- 1979–1980 — Stars in Prisoner.
- 1982 — Appears in The Man from Snowy River.
- 2013–2021 — Plays Sonia Stevens in Wentworth.
- 2022–2023 — Stars in Darby and Joan.
- 2023 — Reveals ADHD diagnosis; appointed NIDA Fellow.
- 2025 — Competes on I’m a Celebrity…Get Me Out of Here! Australia.
- 2026 — To perform in Fiddler on the Roof.
Clarity check: what we know and what’s uncertain
- Thornton is still acting as of 2025.
- She was diagnosed with ADHD.
- She is married to Tom Burstall.
- She and Tom Burlinson are friends.
- She was made a NIDA Fellow in 2023.
- Exact length of marriage not publicly stated.
- Specific upcoming TV/film projects beyond Darby and Joan not confirmed.
- Details of her ADHD diagnosis timeline are limited to 2023 public disclosure.
In her own words and others’
“Getting that diagnosis was like a light switch. Suddenly everything made sense — why I could never sit still, why my mind raced. It’s liberating.”
— Sigrid Thornton, speaking to Chattr in 2025
“Sigrid is one of those rare people who makes you feel like you’ve known her your whole life. We’ve been friends since Snowy River and that hasn’t changed.”
— Tom Burlinson, interviewed by Sydney Morning Herald in 2024
“Sigrid’s appointment as our inaugural Fellow reflects her extraordinary contribution to Australian theatre and her commitment to nurturing the next generation.”
— National Institute of Dramatic Art, quoted on her official site
Sigrid Thornton’s career is a case study in longevity built on reinvention — from feisty inmate to gangland queen to matchmaker on Broadway-bound stage. For Australian audiences wondering what happened to the face of Prisoner, the answer is she’s still very much here, now as an advocate for neurodiversity and arts funding. Thornton’s choice for her next chapter is clear: keep breaking new ground, or risk being remembered only for the past.
Related reading: Alan Dale Biography: Career from Neighbours to Dynasty
Frequently asked questions
What is Sigrid Thornton’s most famous role?
Her most famous role is arguably Lynn Warner in the TV series Prisoner (1979–1980), though she is also widely recognised for Jessica Harrison in The Man from Snowy River and Sonia Stevens in Wentworth.
When did Sigrid Thornton start acting?
She began her professional acting career at age 14 in 1973, according to her official website.
Has Sigrid Thornton won any awards?
Yes, she was appointed an Officer of the Order of Australia (AO) in the 2022 Queen’s Birthday Honours for distinguished service to the performing arts.
Where is Sigrid Thornton from?
She was born in Canberra, Australia, and grew up in various parts of the country due to her father’s career in the public service.
Does Sigrid Thornton have children?
Yes, she has two children with her husband Tom Burstall.
What is Sigrid Thornton’s connection to Wentworth?
She played the manipulative Sonia Stevens in seasons 5–8 of the prison drama Wentworth (2013–2021).
Is Sigrid Thornton active on social media?
She maintains a low-key presence, primarily using Instagram for updates on her projects and advocacy.
What other actors have worked closely with Sigrid Thornton?
Notable co-stars include Tom Burlinson (The Man from Snowy River), Pamela Rabe (Wentworth), and Bryan Brown (The Return of Captain Invincible).
Alex Chen is Editor-in-Chief at Australia Data, overseeing editorial standards, publication decisions and corrections.