Photo: Jeff Kravitz/Filmmagic

Cobie Smuldersdid extensive research when she said yes to taking on the role ofAnn Coulter.
In an exclusive interview with PEOPLE, theHow I Met Your Motheralum, 39, opens up about playing the conservative commentator in FX’sImpeachment: American Crime Story, which premiered Tuesday, and the work she put in to capture every essence of Coulter.
“I did not consult with her,” says Smulders, 39, who took over the role from Betty Gilpin after theGLOWstar was forced to drop out due to scheduling conflicts. “I listened to almost every one of her books. She’s written quite a few and I’ve listened to a majority of them, if not all. So that was helpful.”
“She’s a very public figure and she has a certain way of speaking in cadence and personality,” she adds. “So I looked into that. Also, this is a depiction of pop culture in the nineties. It was hard to gauge where she was at mentally and where she was, what her drive was at that point in her career. I did a lot of research!”
Getty; Tina Thorpe/FX

The new series will cover the affair between former White House internMonica Lewinsky(Beanie Feldstein) and former presidentBill Clinton(Clive Owen) that ultimately led to his impeachment.
On top of channeling the mental and emotional aspects of her character, Smulders enjoyed the physical changes that helped transform her into Coulter, 59.
“One thing I will say about Ann, she’s got fantastic hair,” says Smulders.
“There was a big process with the wig. The makeup department did a great job shading and altering my face to be a little bit more similar to hers,” she explains.
And while they didn’t share any scenes together, Smulders enjoyed the physical changes her husband and costar Taran Killam (who plays civil servant Paula Jones' husband, Steve) underwent as well.
“Taran went through different versions of haircuts,” says Smulders. “They weren’t great or super attractive, but you know, he can pull off anything. It was nice to have a little change.”
As far as sharing a project together, Smulders says it was “cool” for both personal and professional reasons.
“Taran was hired on the show first, so I had been hearing about the production and how great it was,” Smulders shares. “He was just really positive about the experience.”
“It was truly nice for us because our family’s here in Los Angeles and we were both able to be here and work in the city that we were also homeschooling our children,” she adds. “It was fun.”
Lewinsky, 48, serves as a producer on the show, which is based onJeffrey Toobin’s bookA Vast Conspiracy: The Real Story of the Sex Scandal That Nearly Brought Down a President.
Impeachment: American Crime Storyairs Tuesdays (10 p.m. ET) on FX.
source: people.com