Jason Momoa is the latest actor jump on the Dune casting train.
Momoa, recently a big draw in Aquaman and of course his turn as Khal Drogo in Game of Thrones, is apparently in strong discussions over joining the cast as Duncan Idaho. This is a highly significant casting choice as Idaho - or myriad clones of him - is the only character to appear in every one of the original six canonical Dune novels. If the movie is a big hit and the entire series is adapted for film, Momoa could be playing this role for a long time.
If the talks are successful, Momoa will be joining a star-studded cast consisting of Josh Brolin as Gurney Halleck, Oscar Isaac as Duke Leto Atreides, Javier Bardem as Stilgar, Zendaya as Chani, Stellan Skarsgård as Baron Vladimir Harkonnen, Dave Bautista as Rabban, Timothée Chalamet as Paul Atreides, Charlotte Rampling as Reverend Mother Gaius Helen Mohiam and Rebecca Ferguson as Jessica Atreides. The two-part film will be directed by Denis Villeneuve, who has directed the two finest SF movies this decade (Arrival and Blade Runner 2049).