Quick answer: Stéphanie Magnin and Jose Coronado lead The Truthers as estranged daughter Ruth and her father, Martín. Fanny Gautier plays Lucía, Alberto Olmo plays Arón, and Mabel Del Pozo is also part of the principal Netflix cast.
The Truthers cast and character guide
| Actor | Character | What to know |
|---|---|---|
| Stéphanie Magnin | Ruth | An estranged daughter who returns home after her mother dies under strange circumstances. |
| Jose Coronado | Martín | Ruth’s retired father, whose aggressive behaviour and conspiracy obsession make her deeply suspicious. |
| Fanny Gautier | Lucía | A named supporting character confirmed by Netflix. |
| Alberto Olmo | Arón | A named supporting character confirmed by Netflix. |
| Mabel Del Pozo | Not publicly identified | Listed by Netflix among the movie’s principal actors. |
| Israel Ruiz | Doctor Velasco | A supporting role listed in public screen credits. |
| Olaya Lopez | Police officer | A supporting role listed in public screen credits. |
Stéphanie Magnin as Ruth
Ruth is the viewpoint character at the centre of the mystery. She is 30, has kept her distance from her family for years and only returns when her mother dies in circumstances that do not feel right. Her homecoming forces her into close quarters with a father she no longer understands.
Magnin’s role carries the movie’s most important question: is Ruth correctly reading the danger around her, or is suspicion reshaping everything she sees? The official premise makes her fear of Martín the engine of the thriller without revealing whether that fear is justified.
Jose Coronado as Martín
Martín is Ruth’s retired father. By the time she comes home, he has become grumpy, aggressive and consumed by a sinister conspiracy theory. His erratic behaviour turns an already strained reunion into something much more threatening.
Coronado is the other half of the film’s central power struggle. Martín may be grieving, paranoid, dangerous or hiding a larger truth. The movie’s tension depends on how long Ruth, and the audience, can sit with those possibilities.
Fanny Gautier as Lucía
Fanny Gautier plays Lucía. Netflix confirms the actor-character pairing but keeps Lucía’s place in the mystery under wraps, so it is better to meet the character on screen than attach an unsupported theory to her role.
Alberto Olmo as Arón
Alberto Olmo plays Arón. Like Lucía, Arón is part of the named supporting cast, but Netflix’s early synopsis does not explain his connection to Ruth, Martín or the death that brings the family back together.
Mabel Del Pozo and the supporting cast
Netflix lists Mabel Del Pozo among the movie’s principal actors without naming her character on the India title page. Public credits also list Israel Ruiz as Doctor Velasco and Olaya Lopez as a police officer. Netflix has not published fuller character descriptions for these supporting roles.
Who made The Truthers?
Roger Gual directs the film. Carlos Montero and Darío Madrona wrote the screenplay and serve as executive producers with Diego Betancor. Juana Jiménez is the cinematographer, and the production filmed in Asturias, Madrid and Berlin.
The Truthers is streaming globally on Netflix after its July 24, 2026 release. Our OTT guide has the India availability and official trailer, while our The Truthers review gives the spoiler-light watch-or-skip verdict. The movie also appears in the July 20 to July 26 OTT roundup.
The Truthers cast FAQ
Who plays Ruth in The Truthers?
Stéphanie Magnin plays Ruth, the estranged daughter who returns home after her mother’s strange death.
Who plays Martín in The Truthers?
Jose Coronado plays Martín, Ruth’s retired father and the focus of her growing suspicion.
Who plays Lucía and Arón?
Fanny Gautier plays Lucía, and Alberto Olmo plays Arón.
When does The Truthers release on Netflix?
The Truthers releases globally on Netflix on July 24, 2026.