The Vicar of Dibley actress will play Corden's mum in the new six-part BBC Two show.
[Dawn French and James Corden]
Silent Witness star Emilia Fox, Dan Renton Skinner, best known for playing Angelos Epithemiou on Shooting Stars, Thick of It actress Rebecca Front and Him and Hers' Sarah Solemani will also appear in the series.
Lock, Stock And Two Smoking Barrels actor Nick Moran and Prometheus star Benedict Wong complete the latest castings.
The Wrong Mans has been written by Corden and Mathew Baynton, who will play a duo that get caught up in a conspiracy after they discover a ringing phone at a crash scene.
[Dawn French in The Vicar of Dibley]
The original concept was developed when Baynton and Corden worked together on Gavin & Stacey.
Exec-producer Mark Freeland has claimed that the show will mix "comedy with explosions".
The show will air later this year on BBC Two.