Meet the cast of ITV’s psychological thriller Liar

Joanne Froggatt and Ioan Gruffudd lead the cast of this new drama from the Williams brothers


New ITV drama Liar, which is up against Jack and Harry Williams’ other drama Rellik on BBC1, continues on Monday 18th September on ITV at 9pm.


Here are all the characters you need to know – and where you’ve seen them before.

Laura Nielson – Joanne Froggatt

Joanne Froggatt as Laura in Liar

Who does she play? Laura teaches English at a local secondary school. When we meet her she is single for the first time in many years as her ex-boyfriend Tom moves the last of his stuff out of her flat. She is persuaded to go out with the handsome father of one of her students, and the date goes well – until it doesn’t.

Where have I seen her before? Most famously, Joanne Froggatt starred as lady’s maid Anna Bates in Downton Abbey, winning a Golden Globe for best supporting actress. She’s also been in Coronation Street, Murder in the Outback, and recently in the ITV series Dark Angel – where she played the serial killer Mary Ann Cotton.

Andrew Earlham – Ioan Gruffudd


Who does he play? Andrew is a highly-respected cardiac surgeon, popular with his colleagues and patients. A widower, he decides to ask Laura out when he bumps into her at the school. After his date Andrew tells everyone he had a perfect evening, but he has a completely different account of events compared to Laura’s.

Where have I seen him before? Welsh actor Ioan Gruffudd played Fifth Officer Harold Lowe in the classic movie Titanic. In the 20 years since, he’s been in Fantastic Four, Amazing Grave, W, and the original Poldark.

Katy Sutcliffe – Zoe Tapper

Zoe Tapper as Katy Sutcliffe in Liar

Who does she play? Laura’s sister Katy lives nearby. She is the one who persuades Laura to go out with Andrew, and she helps her sister deal with the fallout. But Katy is hiding a big secret with the potential to shatter her family.


Where have I seen her before? Zoe Tapper also currently stars in ITV drama Safe House. She’s also been in Mr Selfridge, Agatha Christie’s Marpe, and Survivors.