Rampling will be playing the role of Reverend Mother Gaius Helen Mohiam, the Truthsayer and advisor to Emperor Shaddam IV. Mohiam is a senior member of the Bene Gesserit sisterhood.
Rampling is an experienced actress with a long history in British, Italian and French cinema, particularly arthouse movies. Her recent credits include the second season of Broadchurch and the drama English Spy. In the US she is probably best-known for appearing on the final season of Dexter.
It is anticipated that the new movie will start shooting in the next couple of months for a 2021 release.