Things are getting progressively interesting for the "Hellboy" reboot, which is set to star "Stranger Things" actor David Harbour in the titular role. Earlier this year, the reboot was announced, bringing back creator Mike Mignola, who's set to build another fantastic world with "Game of Thrones" director Neil Marshall and scriptwriter Aron Coleite.

The latest addition to the cast is a very familiar face and is no stranger to the world of action and fantasy. Deadline exclusively reported that "Resident Evil" star Milla Jovovich is in final negotiations to star alongside Harbour as the Blood Queen herself.

Who is the Blood Queen?

It's not yet certain what kind of interpretation of the Blood Queen the "Hellboy" reboot will present, but the character is known as Nimue, the Lady of the Lake. In "Hellboy" mythology, the Blood Queen is a character who lived during King Arthur's time, during which she kept all of Merlin's secrets and used it against him.

Other Witches of England defeated the Blood Queen and cut her into pieces to scatter all over the world, but she would always reassemble, so the witches opted to put her in a box and bury her in the earth. She was only resurrected when the blood of an entire village was poured into her box. Given that the subtitle of the upcoming "Hellboy" reboot is "Rise of the Blood Queen," the film may delve into the backstory of this particular villain, to be played by "Resident Evil" star Milla Jovovich.

Film is set to have an R-rating

One of the more interesting things about "Hellboy: Rise of the Blood Queen" is that it's already touted to be an R-rated film. Films with such ratings have seen massive success recently, especially with Marvel's "Logan" and 20th Century Fox's "Deadpool." Neil Marshall told the Post Mortem podcast (via Gamespot) that with that R-rating in place, "We can make the movie we want to make.

It's not like I'm going to force it to be R-rated, but if it happens to come out that way, just because of my own sensibilities, then fine. And nobody's going to stop us."

The "Hellboy" reboot director also explained that the original Mike Mignola "Hellboy" comics from Dark Horse were "kind of bloody, so I'm going to embrace that." "Rise of the Blood Queen" is set to begin filming next month and does not have a release date set in stone just yet. For now, fans can catch David Harbour as he returns as Chief Jim Hopper in Netflix's "Stranger Things" season 2 this October.