Exclusive: Homecoming and The Beach star Virginie Ledoyen has boarded Channel 5 series The Au Pair opposite David Suchet.

The Cesar-nominated French actress will play a whistleblower in the thriller, whose pivotal role kicks off in the opening scene and spans the rest of the show.

From Pernel Media and MK1 Studios, The Au Pair follows Zoe Dalton (Sally Bretton), who seems to have it all, including successful husband Chris (Kenny Doughty). When she hires an au pair, Sandrine (Ludmilla Makowski), the beguiling young French woman triggers an unsettling shift in the household as instincts and suspicions arise, hinting at hidden agendas.

The show for the Paramount UK network is Poirot icon Suchet’s first TV role for six years and he plays George, Zoe’s diabetic father who moves next door.

Having been Cesar-nominated for 1995’s A Single Girl, Ledoyen achieved international fame opposite Leonardo DiCaprio in The Beach,...