"I share similar brain waves with Marcia Clark," Paulson tells PEOPLE

By Patrick Gomez
Updated February 02, 2016 02:25 PM
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Credit: FX

Getting into character as O.J. Simpson trial prosecutor Marcia Clark was not as difficult as Sarah Paulson thought it would be.

“I share similar brain waves with her,” says the actress tells PEOPLE of the real-life woman who inspired her character on FX’s The People v. O.J. Simpson: American Crime Story, which premieres Tuesday.

“I have a tenacious spirit, and so does she,” says Paulson, 41. “She’s fighting for something she truly believes in and for justice for those two people who were brutally murdered. The fight she’s fighting is something I can get behind.”

Paulson was filming American Horror Story: Hotel at the same time as American Crime Story, so being prepared on set was essential.

“I did so much reading and watching her for research that I feel she lives somewhere in my being,” she says.

Working on the 10-part limited series opened Paulson’s eyes to a lot of things about the mid-’90s trial that inspired it.

“As dramatic as it was to watch on TV when it was happening, it was even more so behind the scenes,” she says of the trial. “You can’t believe the things that went on interpersonally. It’s a very fascinating thing. It’s going to be good.”

The People v. O.J. Simpson: American Crime Story premieres Tuesday at 10 p.m. ET on FX.