Most people have never heard of Celia Glenister. Millions of them have heard her work without knowing it.
She is the radio drama producer and director behind the Stephen Fry Harry Potter audiobooks — the recordings released from 1999 that sold hundreds of millions of copies and became the sound of childhood for an entire generation of British listeners. Outside her professional world, almost nobody knows who she is.
Known in the industry as Celia de Wolff, she has been producing and directing radio drama since 1986. She is the wife of British actor Robert Glenister and the mother of actor Tom Glenister. Over four decades, she has shaped some of the most listened-to audio drama in BBC history — working almost entirely out of public view.
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Who Is Celia Glenister?
Celia’s professional name is Celia de Wolff. She uses Celia Glenister socially and at public events, a name she took from her marriage to Robert Glenister in 1999. She is British, based in London, and has been working in BBC radio drama production since 1986 — initially in-house at the BBC, then as a freelance producer and director.
For years, she has been one of the core producers and directors for Pier Productions, the Brighton-based independent company founded in 1993 that supplies award-winning drama to BBC Radio 4 and Radio 3. She also produces for Audible UK.
She is not an actor. Her entire career has been on the production side — adapting literature, directing performances, and building audio drama from the page up.
The Harry Potter Audiobooks That Made Her Name (In Circles That Know)
In 1999, Celia de Wolff produced Harry Potter and the Philosopher’s Stone for Cover to Cover Cassettes and HNP Ltd, read by Stephen Fry. It was the first in what would become one of the most successful audiobook series ever recorded.
The scale of what followed is worth understanding properly:
- Harry Potter and the Philosopher’s Stone won the 1999 Talkie Award
- Multiple books across the series earned the Gold Spoken Word Award, printed on the original cassette and CD packaging
- The complete seven-book series runs to over 124 hours of recorded drama
- The recordings have sold in the hundreds of millions globally and remain the version most British listeners consider definitive
For children growing up in Britain at the turn of the millennium, Stephen Fry’s voice reading Harry Potter was the sound of their bedtimes. The person directing those sessions, deciding how each scene played, was Celia de Wolff.
She returned to the series in 2025. Her IMDb credits include the new Harry Potter and the Philosopher’s Stone full-cast audio edition, released on Audible in November 2025, produced with over 500 voice actors and Dolby Atmos technology.
A BBC Radio Drama Career That Runs Far Deeper
The Harry Potter recordings are the most publicly visible part of her work. The BBC radio career behind them is considerably wider.
Since 1986, she has produced and directed across a broad range of drama for Radio 4 and Radio 3, through both the BBC directly and Pier Productions. Her major credits include:
| Production | Year | Details |
|---|---|---|
| War & Peace (starring John Hurt) | 2015 | BBC Radio 4, New Year’s Day, 10-hour broadcast |
| The Mermaid of Zennor | 2015 | BBC Radio 4, 45-minute drama, writer Paul Dodgson |
| Return to Vegas | Pre-2020 | Musical drama starring Roland Gift (Fine Young Cannibals) |
| Elena Ferrante’s Neapolitan Novels | BBC Radio | Dramatised by Timberlake Wertenbaker |
| Long Day’s Journey into Night | BBC Radio | Eugene O’Neill adaptation |
| Camberwell Green | 2021 | BBC Radio 4, two-part crime thriller, written by Nicola Baldwin |
| Seven Scenes | BBC Radio 3 | The Wire strand, also written by Nicola Baldwin |
War & Peace stands as one of the landmark productions in modern BBC Radio history. The 10-hour all-day broadcast on Radio 4, on New Year’s Day 2015, starred John Hurt and was produced through Pier Productions. Radio Times called it “the radio event of the year.”
During the 2020 COVID lockdown, she was simultaneously recording an 8-hour adaptation of Jane Austen’s Sense and Sensibility with actors spread across London, Los Angeles, and France — including Emma Mackey, then known for Netflix’s Sex Education.
The Night She Picked Up a Camera for the First Time
In spring 2020, ITV produced Isolation Stories, a four-part anthology filmed inside the homes of each cast under strict social distancing. Robert Glenister was cast in episode two, titled Ron & Russell, playing a father living with early-stage dementia, locked down with his estranged son. That son was played by their real-life son, Tom Glenister.
The immediate practical problem: someone had to operate the camera. Under lockdown rules, nobody could enter the house.
Celia stepped in. Equipment was sterilised and left on the street outside. She collected it, learned what she needed to know, and shot the episode herself. Robert told VODzilla afterward that the crew had started calling her “Celia B. De Mille.”
She described the experience in her own words: “It was hard work but I did really enjoy it.” Watching it back as a viewer rather than as the person behind the lens, she said she found it “incredibly powerful.”
The subject matter carried personal weight beyond the production. Her stepfather was going through early-stage dementia at the time — the same condition Robert’s character was experiencing on screen.
Robert Glenister, Tom Glenister, and a Household Built Around British Broadcasting
Celia married Robert Glenister in 1999. Their son Tom was born in May 1996 in Hammersmith, London. He is now a working actor, with credits including:
- Trigger Point (2022, ITV)
- Sherwood (2022, BBC) — where he played a younger version of his father’s character
- Grantchester (ITV)
Robert Glenister is best known for playing Ash Morgan in Hustle and Nicholas Blake in Spooks. His brother is actor Philip Glenister, known for Life on Mars and Ashes to Ashes. Their father, John Glenister, directed for BBC television across several decades, with credits including the 1972 adaptation of Emma.
Robert’s production company was called Big Bad Wolff — a direct reference to Celia’s surname, de Wolff. The name became publicly known in 2019 when the company lost a dispute with HMRC over National Insurance contributions, leaving Robert facing a bill of £147,000.
Her Charity Work
Celia is an ambassador for Link Age Southwark, a London charity that works to prevent loneliness and isolation among older people and those living with dementia in Southwark. The involvement is personal. Her stepfather has experienced early-stage dementia, and she has spoken directly about the time she spends supporting him and her mother as a result.
Four Decades of Work That Outlasts the Credits
In March 2026, Celia de Wolff’s name still does not appear on most conversations about British broadcasting. She has given almost no interviews. Her one interview on public record — with VODzilla in 2020 — came about because her husband and son were in a television episode she happened to shoot.
The work, though, is everywhere. The child who listened to Harry Potter and the Philosopher’s Stone on a cassette player in 1999 was inside a production she made. The Radio 4 listener who stayed home on New Year’s Day 2015 for John Hurt reading Tolstoy was hearing her direction. Anyone pressing play on the new Audible edition today is hearing her work again.
Celia Glenister has spent close to 40 years making other people’s words worth listening to. Few people in British audio drama have more to show for it.
