Performer
A performer whose catalogue work here is strong, with the fuller case still to be made.
Nutevio rank
#18587
of 909177 performers
Top 5%
Siobhan Williams works on quiet performance rather than volume, and the catalogue keeps proving that the quieter choice was the correct one.
The essay
Our editors on the work, the patterns and the reason this body of work holds together.
Siobhan Williams appears in 4 films in the Nutevio catalogue, and none of them would work the same way without Siobhan. The Boy with My Son's Face is the clearest case: a film rated 6.5 by our editors, where the performance carries weight the script only implies.
The recognisable elements are quiet performance, versatility, transformation. Watch two of these films back to back and the method separates from the material — the same instrument, tuned differently for mystery, drama, thriller. It is a style built on what is withheld as much as what is played.
Working with Gigi Saul Guerrero, Robert Zemeckis, Jon Cassar, Siobhan Williams helped set a standard other performers now audition against. Awards bodies have been slower than the work, which is usually the sign of a career built on choices rather than campaigns.
The Boy with My Son's Face (2026) as Amy · Welcome to Marwen (2018) as Elsa · Forsaken (2015) as Emily Chadwick
Career snapshot
Ranked #18587 of 909177 performers tracked in the Nutevio library.
Films in Nutevio
4
2015–2027
Career length
12 yrs
Measured across our catalogue
Academy Awards
—
Unknown
Oscar nominations
—
Unknown
Highest Nutevio score
6.5
The Boy with My Son's Face
Average Nutevio score
4.8
Across catalogue work
Highest IMDb rating
6.5
The Boy with My Son's Face
Most frequent director
Gigi Saul Guerrero
1 film together
Longest collaboration
1×
With Gigi Saul Guerrero
Most common genre
Drama
3 titles
Average runtime
1h 13m
Across catalogue work
Golden Globe wins
—
Unknown
Nutevio metric
Ten weighted categories, applied identically to everyone we cover.
Nutevio Performer Score
6.8
out of 10
A performer whose catalogue work here is strong, with the fuller case still to be made.
Nutevio metric
Cultural impact and legacy, measured separately from craft — how far the work travelled once it left the cinema.
Nutevio Influence Score
6.1
out of 10
A quieter influence — felt inside the films rather than across the industry.
How far the work travelled past the people who saw it first.
What survives once the release-week conversation has burned off.
Institutional acknowledgement, weighted but never decisive.
Years of chosen, relevant work rather than years merely employed.
Statuettes, read as evidence rather than verdict.
Roles named without needing the film named alongside them.
Directors who wrote parts because this performer existed.
The reading other performers now have to answer.
Actor DNA
A fingerprint derived from the roles themselves — register, range and the kind of film they carry.
The shape of a career
Every performance plotted in time. Hover a point to read the title behind it.
Peak years
Where the scores, the awards and the sheer volume of work agree with each other.
Best decade
2010s
6.3 average MV
The 2010s are where the work and the material meet. Welcome to Marwen, Forsaken — the run our editors reach for first when the argument is about range rather than fame.
Highest average Nutevio score
2010s
6.3
Across 2 catalogue films in this decade, our scores never drop below the level a career is judged on.
Highest average IMDb rating
2010s
6.3
The public agrees most strongly about this stretch — useful context, and occasionally a decade behind our own reading.
Most awarded era
2010s
0 Academy Awards
Statuettes for the films themselves, which is the honest way to read an ensemble career. Welcome to Marwen, Forsaken.
Most productive era
2010s
2 films
The busiest stretch of the catalogue — volume that reads as appetite rather than availability.
Range, mapped
Genres down the side, decades across the top. Warmer cells mean stronger titles.
| Genre | 2010s | 2020s |
|---|---|---|
| Drama | 6.51 film | 3.32 films |
| Thriller | — | 3.32 films |
| Comedy | 6.51 film | — |
Chronology
Firsts and peaks
The turning points, in the order they happened.
First film in Nutevio
2015Forsaken
Where our catalogue meets this career, as Emily Chadwick.
Highest rated performance
6.5 on the Nutevio scale, the top of the catalogue for this performer.
Career peak
2026The Boy with My Son's Face
Weighing billing against the film's own quality, this is the point where everything aligned at once.
Most recent film
2027Harmonia
The current state of the argument, as Shine.
Our order
Every performance in the catalogue, ordered by Nutevio Score.
Every title
Filter by genre or decade, and compare any two titles side by side.
4 of 4 films
as Amy
Directed by Gigi Saul Guerrero
as Emily Chadwick
Directed by Jon Cassar
From the library
Every movie and TV credit stored for this name in the Nutevio catalogue — filter by media, role or sort by rating.
Loading credits…
The defining work
#1
Amy
The Boy with My Son's Face (2026)
Performance score7.0
The performance the rest of the career is read through. Amy gives Siobhan Williams a structure to work against, and the film hands over its centre of gravity without hesitation.
View movie#2
Shine
Harmonia (2027)
Performance score6.5
Harmonia asks for something the previous films did not, and gets it. Shine is played without a single line of pleading for the audience's sympathy — which is exactly why it lands.
View movie#3
Elsa
Welcome to Marwen (2018)
Performance score6.5
Welcome to Marwen asks for something the previous films did not, and gets it. Elsa is played without a single line of pleading for the audience's sympathy — which is exactly why it lands.
View movie#4
Emily Chadwick
Forsaken (2015)
Performance score6.5
Forsaken asks for something the previous films did not, and gets it. Emily Chadwick is played without a single line of pleading for the audience's sympathy — which is exactly why it lands.
View movieStart here
A guided path through the work, ordered so each film explains the next.
Best entry point
as Amy
Start here. The Boy with My Son's Face is the clearest statement of what Siobhan Williams does — accessible, 86 minutes, and rated 6.5 by our editors. No context required.
Our editors order this path by accessibility first and chronology second. You meet Siobhan at the most legible performance, then move forward in time so each film reads as a response to the one before it rather than a repetition of it.
Forsaken (2015)
A deliberate change of key after The Boy with My Son's Face — same instrument, unfamiliar tuning, and the reason range gets mentioned.
Welcome to Marwen (2018)
A deliberate change of key after Forsaken — same instrument, unfamiliar tuning, and the reason range gets mentioned.
Harmonia (2027)
Keeps the drama register of Welcome to Marwen but asks for a colder reading of it.
Company kept
The directors and performers this career keeps returning to.
Behind the camera
Who casts this performer, how often, and what the pairing produces.
Gigi Saul Guerrero
Director
1 film together · 6.5 avg MV
One film, but the kind that reorganises how a performer is cast afterwards.
Best film together
The Boy with My Son's FaceRobert Zemeckis
Director
1 film together · 6.5 avg MV
One film, but the kind that reorganises how a performer is cast afterwards.
Best film together
Welcome to MarwenJon Cassar
Director
1 film together · 6.2 avg MV
One film, but the kind that reorganises how a performer is cast afterwards.
Best film together
ForsakenSix degrees
Follow the thread outward — director, film, co-star, and the film after that.
Categories of our own
Six editorial categories we apply to every performer we cover.
Most rewatchable
Welcome to Marwen
as Elsa
The one that survives a fourth viewing. Nothing in the performance depends on surprise, which is why it keeps paying out.
Most emotional performance
The Boy with My Son's Face
as Amy
Grief played at conversational volume. The film never asks the audience to cry; the performance simply makes it difficult not to.
Most influential performance
Welcome to Marwen
as Elsa
You can hear this reading in other actors' auditions a decade later — the surest measure of influence there is.
Best ensemble performance
Welcome to Marwen
as Elsa
Work that makes everyone else in the frame better without ever pulling the camera towards itself.
Career defining performance
The Boy with My Son's Face
as Amy
If the career had to be argued in a single scene, our editors would pick one from this film and rest the case.
In their films' words
“You can build a whole film around a performer who knows when not to speak. Siobhan Williams has known it for a long time.”
Head to head
Put two careers on the same scale and see where the argument actually sits.
Ours alone
Recognitions handed out by this desk, on criteria no awards body uses.
Modern Classic Performer
Awarded
Defining performances delivered inside the last twenty-five years, in films already being taught rather than merely remembered.
Drama Legend
Awarded
3 catalogue titles in drama, each one a reference point for the films that followed.
Our desk
Best ending, best opening, best twist and the rest — categories we apply to everyone we cover.
Best ending
The Boy with My Son's Face
as Amy
The last five minutes reorganise everything before them, and hold up when you already know what's coming.
Best opening
The Boy with My Son's Face
as Amy
A first sequence that states the rules of the film without explaining a single one of them.
Most emotional
The Boy with My Son's Face
as Amy
The film where the technique steps aside and lets the feeling arrive undefended.
Best twist
Harmonia
as Shine
A reversal earned by information the film gave you and trusted you to misread.
Best visual achievement
Forsaken
as Emily Chadwick
Images that would survive with the sound switched off.
Best action sequence
Forsaken
as Emily Chadwick
Geography, stakes and consequence held in the same frame — spectacle you can follow.
Best dialogue
Welcome to Marwen
as Elsa
Lines written to be spoken, staged so the pauses do half the work.
Most underrated film
Harmonia
as Shine
The public vote sits below ours on this one, and the direction is the reason for the gap.
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Have your say
Community
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Reference
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