Oliver Jackson-Cohen is quickly becoming the king of horror. However, he wouldn't see it that way.

He's been in the business for about 20 years now but has only just registered on our radars. In the past three years, his star has skyrocketed as he's played some of the best characters on the big and small screen...that have absolutely terrified us.

In both Mike Flanagan's The Haunting anthology series The Haunting of Hill House and The Haunting of Bly Manor (although they aren't related), he's appeared with Victoria Pedretti and the film The Invisible Man, alongside Elizabeth Moss. All of which have been hugely successful.

Jackson-Cohen is now estimated to be worth $4 million. Still, he didn't earn that money from being one of the world's leading optics engineers like Adrian Griffin in The Invisible Man or an executive assistant like Peter Quint from The Haunting of Bly Manor. His three most famous credits have opened up so many doors for him and have given him a good chunk of change as well.

But how did he get to where he is now?

He's Not Afraid To Be The Bad Guy

Just because Jackson-Cohen was largely out of the picture in The Invisible Man doesn't mean that he got out taking on a character as evil as Adrian. He still had a lot of work to do, and he wasn't afraid to do it. There wasn't any hesitation with taking on the character.

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He told the A.V. Club that since the script was written truthfully, it made him want to be a part of it because it's important to tell these kinds of stories. He liked starring in the horror projects he's done so far because they deal with real horrors that many people deal with.

Playing Luke in The Haunting of Hill House was another welcome role for Jackson-Cohen. One of his first roles was in the Justin Long and Drew Barrymore romantic comedy, Going the Distance, where he played a bartender who flirts with Barrymore's character. When Luke came along, Jackson-Cohen was just thankful he wasn't getting parts like that anymore.

"Luke was the first character [where] I didn't have to be the guy from Going the Distance. I didn't have to be those things. I could just be myself and be vulnerable and be all of the things that I feel all the time. It was quite freeing in a way to play a character like that," he told Entertainment Weekly.

When it came time for Bly Manor, Jackson-Cohen was the first person Flanagan called. He signed up right away even though Flanagan hadn't sold it to Netflix yet and had no idea who he'd play. But he was able to work with Flanagan to conceptualize Peter Quint.

Related: This Cast Member From 'The Haunting Of Bly Manor' Voiced Peppa Pig

"I said, very early on, we can't play him as a villain," the actor said. "It was a similar conversation that director Leigh [Whannell] and I had on Invisible Man. We didn't want him to be the black mustache-twirling [guy]. I think the same thing applied with Peter. Mike and I were both really interested in blurring the lines. What Peter does in Bly is toxic. It is about masculinity and it is about ownership and it's about possession. I kept on saying to Mike, he's a little boy that's really badly hurt and he's put on all of these masks in order to appear to be this thing."

Jackson-Cohen didn't want to go into the horror genre exactly. It just happened that the most recent horror films have great stories. "I don't think it’s necessarily an active decision to want to be part of the genre, but it's just where they've been the most interesting stories to tell recently," he said.

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If Jackson-Cohen goes into more horror-related projects, we won't be mad because he can really play some great villains and psychopaths, but it would be interesting to see him branch out.

In his early career, he starred as Prince William in 2011's Will & Kate: Before Happily Ever After, as well as Mr. Selfridge, Dracula, The Great Fire, The Secret River, Emerald City, and Man in an Orange Shirt. What we'd love to see him in is a really great period piece set in Victorian London. But if Jackson-Cohen continues to pick the sort of roles he's been picking these past couple of years, his net worth is sure to climb.

Next: 15 Interesting Facts About Elisabeth Moss