In ‘Liar‘, Joanne Froggatt plays Laura Nielson, Ioan Gruffudd plays Andrew Earlham, and Zoë Tapper plays Katy Sullivan—a gripping British thriller about a devastating accusation.
Main cast
- Laura NielsonJoanne Froggatt1–2Main
- Dr Andrew EarlhamIoan Gruffudd1–2Main
- Katy SullivanZoë Tapper1–2Main
Supporting cast
- DI Rory MaxwellRichie Campbell1–2Supp
- DS Liam MaclearyDanny John-Jules1–2Supp
- Ian DaviesWarren Brown1–2Supp
- Ruth NielsonSue Johnston1Supp
- Tom NielsonSammy Pout1–2Supp
- Dr Martin NielsonHoward Ward1Supp
Guest & voice
- Detective Constable Amanda HuangUkweli Roach1Guest
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About this cast
Liar is a British psychological thriller series that premiered on ITV in 2017, running for two seasons. The show centres on Laura Nielson, a teacher who accuses a respected surgeon of rape, leading to a tangled web of lies, deceit, and revenge.
FAQs
Who plays Laura Nielson in Liar?
Joanne Froggatt plays the lead role of Laura Nielson, a teacher at the centre of the accusation.
Is Liar based on a true story?
No, Liar is a fictional drama created by Harry and Jack Williams, not based on real events.
How many seasons of Liar are there?
There are two seasons: the first aired in 2017 and the second in 2020.
What is the age rating for Liar?
It is rated 18 (UK) for strong, adult themes including sexual violence and psychological trauma.
Who wrote Liar?
The series was created and written by the brothers Harry and Jack Williams, known for other thrillers like ‘The Missing’.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026