Hermine Poitou is a French graphic designer and artist with documented credits on major public projects in France. She is also married to English actor David Thewlis. He played Remus Lupin in the Harry Potter films.
RATP credits Poitou and designer Catherine Félix with a large mural at Aimé Césaire station. Public documents also name the pair on projects for CNES and France’s National Assembly. These records offer a firmer biography than the unsourced claims that circulate online.
Bottom line: Hermine Poitou has a verifiable creative career and two casting-department credits. David Thewlis publicly confirmed their marriage. Reliable sources do not establish her age, full education history, family background or net worth.
Hermine Poitou at a Glance
| Topic | Evidence-based answer |
|---|---|
| Known for | Graphic design, public cultural projects and her marriage to David Thewlis |
| Profession | French graphic designer and artist |
| Documented projects | Aimé Césaire station mural, a CNES exhibition and a National Assembly catalogue |
| Film credits | Casting assistant on Russian Dolls and casting on A Child’s Secret, according to IMDb |
| Husband | David Thewlis |
| Marriage | August 6, 2016, supported by Thewlis’s fifth-anniversary post |
| Age and birth date | Not reliably public |
| Harry Potter credit | None found; Thewlis creates the franchise connection |
| Net worth | No defensible public estimate |
This summary leaves several fields blank on purpose. A detailed claim does not become true because many biography sites repeat it.
What Does Hermine Poitou Do?
Poitou works in graphic design and visual art. Her clearest public record comes from institutions that name the creators behind their projects.
That distinction matters. Some profiles describe a broad portfolio, signature style and long client list. Few provide direct project evidence. The records below establish specific work without guessing about her artistic philosophy.
The Aimé Césaire station mural
The best-documented example appears at Aimé Césaire station on Paris Métro Line 12. The station opened to passengers on May 31, 2022.
RATP identifies Hermine Poitou and Catherine Félix as the mural’s graphic designers. Writer Élise Thiébaut and iconographer Annie-Claire Auliard also worked on the project.
The mural covers much of the station’s two-part facade. RATP gives its total length as about 109 meters. Illustrations, patterns and excerpts from Aimé Césaire’s writing fill the installation. The imagery reflects themes that shaped his work, including Martinique, Africa and nature.
This source proves more than a generic “artist” label. It connects Poitou to a named, public-facing design that commuters can see.
Public projects for CNES and the National Assembly
Poitou and Félix also received joint credit on an environmental exhibition. The French space agency and the Conservatoire du littoral created Mon littoral par satellite around images from Pléiades satellites.
The CNES project document credits Poitou and Félix with the graphic design. The exhibition used satellite views to introduce coastal landscapes to a public audience.
A separate institutional record connects the pair to French political history. A National Assembly catalogue about the first 33 women elected as deputies lists Catherine Félix and Hermine Poitou for graphic design.
Together, these projects show a recurring focus on public information and culture. They do not prove every client or job title that other sites attach to Poitou. They do establish substantial design work under her own name.
A recent Jean Prouvé tribute
Poitou’s public work record continued in 2026. A professional project announcement described a visual tribute to architect and designer Jean Prouvé at Porte de Champerret in Paris.
The installation accompanied renovation work on a bus-station roof that Prouvé designed in 1982. An installation-partner post credits Poitou and Félix with the graphic creation.
The post provides a useful recent credit. However, it is a professional social-media announcement rather than a full RATP project page. This article therefore treats it as attributed project evidence, not as a complete case study.
Does Hermine Poitou Have Film Credits?
Yes. IMDb lists two casting-department credits for Hermine Poitou. The database names her as a casting assistant on Cédric Klapisch’s Russian Dolls in 2005. Its full crew record includes Poitou in that role.
Her IMDb profile also lists a casting credit for the 2006 television film A Child’s Secret.
These credits support a limited statement about film work. They do not show that she acted on screen or built a large casting career. They also do not connect her to the Harry Potter production team.
When Did Hermine Poitou Marry David Thewlis?
Hermine Poitou and David Thewlis married on August 6, 2016. The strongest date evidence comes from Thewlis himself. On August 6, 2021, he shared wedding images and marked the day as their fifth anniversary.
The date also fits his comments in a July 2021 Guardian interview. He said they had been together for ten years and married for five.
Some headlines described the wedding as secret. Thewlis rejected that framing. He explained that he had worn a wedding ring and simply had not alerted the press.
This distinction respects what he actually said. A private event is not necessarily a hidden one.
How Has Poitou Contributed to Thewlis’s Writing?
Thewlis has credited Poitou with useful feedback on his second novel, Shooting Martha. He told The Guardian that he read the manuscript aloud to her while writing it.
In a December 2021 interview, he said she criticized passages and suggested changes. He added that the exchange kept the process from feeling isolated.
That account offers a specific example of creative collaboration at home. It does not justify broader claims that Poitou manages his career or shapes all of his work.
The same interview includes a playful statement that Poitou once ran a flea circus. The reporter openly questioned whether Thewlis was joking. Without clearer confirmation, that line should remain an anecdote rather than a settled career fact.
What Online Claims About Hermine Poitou Are Wrong?
Several search results attach unsupported or contradictory stories to Poitou. Three problems deserve direct answers.
First, no credible source identifies this Hermine Poitou as a historical scholar of secrets, sacred knowledge or occult traditions. That description appears to create a different, possibly fictional identity. Public project records identify the living Hermine Poitou as a designer.
Second, no reviewed credit places her on a Harry Potter film. Her connection comes through Thewlis, who portrayed Remus Lupin. Describing Poitou as a Harry Potter artist or crew member would overstate the evidence.
Third, reliable sources do not publish her birth date. Some pages estimate her age from alleged school years. Others copy detailed education dates from profile aggregators. Neither method verifies a birthday or a complete academic history.
Poitou’s public professional profile does associate her with Camberwell School of Art and Design. That self-listed detail can guide further research. It does not support the precise timelines and degree descriptions that unsourced biographies add.
Is Hermine Poitou’s Net Worth Public?
No reliable source establishes Hermine Poitou’s net worth. Public design credits show that she completed professional work. They do not reveal her fees, annual income or ownership of assets.
Net worth equals assets minus liabilities. A credible estimate would need evidence about both sides of that calculation. No reviewed filing, disclosure or reliable financial report provides it.
Some websites publish numbers such as $800,000 or $1 million. They do not show their method. David Thewlis’s earnings also cannot serve as a substitute for Poitou’s personal finances.
The responsible conclusion is simple: no defensible public estimate exists.
Frequently Asked Questions
Who is Hermine Poitou?
Hermine Poitou is a French graphic designer and artist. RATP and other French public institutions credit her on cultural and informational projects. She is also David Thewlis’s wife.
What does Hermine Poitou do?
She works in graphic design and visual communication. Her documented projects include the Aimé Césaire station mural, a CNES coastal exhibition and a National Assembly catalogue.
Who is Hermine Poitou’s husband?
Her husband is English actor David Thewlis. Audiences know him for Naked, Fargo, The Sandman and his role as Remus Lupin in the Harry Potter series.
When did Hermine Poitou and David Thewlis marry?
They married on August 6, 2016. Thewlis supported that date when he marked their fifth anniversary on August 6, 2021.
How old is Hermine Poitou?
Her exact age is not reliably public. No authoritative source reviewed for this article provides a confirmed birth date, so age estimates should not appear as facts.
Did Hermine Poitou work on Harry Potter?
No reviewed source gives Poitou a Harry Potter production credit. The connection comes from David Thewlis, who played Professor Remus Lupin in five films.
What is Hermine Poitou’s net worth?
No reliable public evidence supports a numeric estimate. Project credits establish professional activity, but they do not reveal her assets, debts or income.
Conclusion
Hermine Poitou has a documented identity as a French graphic designer and artist. Her public credits include work for RATP, CNES and France’s National Assembly. Film databases also record two early casting roles.
Her marriage to David Thewlis explains much of the search interest, but it should not erase her own work. The evidence also sets clear limits. Her exact age, full education history, private family details and net worth remain unverified.
A useful Hermine Poitou biography should preserve those boundaries. It should highlight the work that institutions credit and leave unsupported details out.
Sources and Corrections
This article prioritized public-institution project records, first-person interviews and named crew credits. Supplied competitor pages helped identify disputed claims but do not serve as visible evidence.
Poitou does not have a dedicated English-language Wikipedia biography. The closest relevant entry is David Thewlis’s Wikipedia page, which explains the public connection. It should not serve as sole proof for Poitou’s private details.
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