Oscar Isaac relished playing an "unhinged" character in Frankenstein.

The 46-year-old actor plays Baron Victor Frankenstein, a surgeon who seeks to create life from death, in the new Frankenstein film, and Oscar admits that he loved shooting the Guillermo del Toro-directed sci-fi movie.

Speaking to Teyana Taylor for Variety, Oscar explained: "I don't know if I've ever got stuck in something.

"I did have a hard time when I went into another project after Frankenstein. It wasn't until I brought back Victor to talk for a moment that I realised … After Frankenstein, I was playing a character that was quite tight and small; Victor was still in there, angry that he had to be in this tiny little sad man.

"There was something about playing Victor that was very freeing and pleasurable. He is a character that loves pleasure -- a bit like Perfidia. There was something about playing somebody so unhinged, with no regard for moral judgement, that it's this vitalist energy that was really exciting and pleasurable to play. Leaving that was really hard."

Oscar explained that he actually developed his own rituals during the movie shoot.

He said: "I've started to add in a ritual. I show up in the morning and do a little ritual just to get my nervous system ready. To thank the ancestors and begin in a place of openness. And then at the end of the day, even more important, I do a little ritual to say, Thank you, body. Thanks for being open, and now you can release. I've got kids and stuff to do, so I don't need your help anymore."

Meanwhile, Mia Goth - Oscar's co-star - recently confessed that she felt "scared" before she began filming Frankenstein.

The actress felt anxious about working with acclaimed director Guillermo del Toro on the new movie, with Mia fearing that she might actually "ruin" the project.

The Hollywood star - who portrays Elizabeth Lavenza in the film - told Variety: "I've never been so scared stepping into a movie. I really haven't.

"It was a lot for me, and I was always in my head. I kept thinking to myself, 'Guillermo del Toro is making Frankenstein, the movie you've always wanted him to make, and I get to be a part of that.' And I was so scared that I was going to be the one bad thing in it, and I would ruin it."