In the 2023 British thriller ‘Locked in‘, Rose Williams plays Lina, Famke Janssen plays her mother-in-law Katherine, and Alex Hassell plays Katherine’s husband Dr. Alex. The story twists lies and betrayal in a London mansion.
Main cast
- LinaRose WilliamsMain
- KatherineFamke JanssenMain
- Dr. AlexAlex HassellMain
Supporting cast
- JackFinn ColeSupp
- Dr. RobertOliver RoseSupp
- MaggieAnna Wilson-JonesSupp
- JamieHarry LloydSupp
Guest & voice
- Young LinaHarriet WalterGuest
- Forensic AnalystJoanne FroggattGuest
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About this cast
‘Locked In’ is a 2023 British psychological thriller directed by Nour Wazzi. The film follows a young fraud investigator who becomes entangled in a wealthy family’s secrets after communicating with a woman who has been mysteriously locked in a mansion.
FAQs
Who plays Lina in Locked in?
Rose Williams plays the lead character Lina, a fraud investigator drawn into the family’s secrets.
Is Locked in a true story?
No, the film is a work of fiction, though it draws on thriller conventions of family manipulation and hidden crimes.
Where was Locked in filmed?
The film was shot in England, primarily at locations in and around London.
What is the age rating for Locked in?
The film is rated 15 by the BBFC for moderate violence, threat, and language.
Who directed Locked in?
The film was directed by Nour Wazzi, in her feature-film directorial debut.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026