Sheridan Smith and Céline Buckens have been cast as sisters in The Castaways, a Paramount+ drama series based on Lucy Clarke’s novel.

Smith will play Lori and Buckens is her sibling Erin in the thriller, which marks Clarke’s second series adaptation for Paramount+’s UK service.

UK producer Clapperboard Studios and Italian studio Blackbox Multimedia are attached to The Castaways, with filming kicking off on location in Greece and Fiji next month. Mike Benson is an executive producer for Clapperboard, which has regularly made dramas for Paramount+ and its UK network cousin Channel 5, whilst Giuliano Papadia and Chiara Cardoso are exec producers for Blackbox.