The Walking Dead companion series has cast its first two zombie apocalypse survivors. Frank Dillane (Harry Potter and the Half-Blood Prince) and Alycia Debnam Carey (Into the Storm) are set to play the roles of a brother and sister. Dillane’s character is said to “have a drug problem,” while Carey will be playing an “ambitious” role.

Not much has been revealed about the series, tentatively known as Cobalt, other than the fact that it will be set in the same universe as the current The Walking Dead television show, but in a different location. Now that two names are attached to the project, it’s safe to say that more information regarding the series will be announced shortly.

[Source: Deadline]