After watching Viola Davis‘ portrayal of Michelle Obama in the first episode of The First Lady, viewers are pointing to the actor’s unusual facial characteristics. Dozens of people went to Twitter to ask why Davis continuously purses her lips in Sunday’s debut episode. 

Speaking with The Guardian, Davis said she is “terrified” about what Michelle Obama will think of her portrayal.

“Here’s the thing about Michelle Obama, which is very different from me, different from a lot of people: she’s healthy,” Davis said, according to The Guardian. “She’s a healthy human being, because she grew up in an environment where she always felt seen, always felt worthy. Maybe because I’ve been with a lot of artists in my life, a lot of people who’ve been traumatized, including myself, it’s very interesting to portray someone who literally is healthy.”

The actor said she watched the documentary Becoming at least 22 times while preparing for the role. The 56-year-old also spent time with the Obamas and read their books.

Davis is also noted for her role as James Brown’s mother in Get on Up, acting alongside the late Chadwick Boseman.

“I enjoyed being in Mississippi. I loved Chadwick, loved Chadwick. It was sort of awesome,” the Oscar-winning actor said.

Michelle ObamaThe First LadyViola-Davis