Sarah Paulson's Shocking Transformation as Aileen Wuornos in New 'Monster' Series

Sarah Paulson dramatically changed her look to play infamous serial killer Aileen Wuornos in Season 4 of Ryan Murphy’s “Monster: The Lizzie Borden Story.”

In the full trailer for the Netflix series, which dropped Thursday, the actress transformed into Wuornos’ weathered appearance with shaved eyebrows, straggly dirty blond hair, pale skin and rotted teeth.

“No one really knows what happened that day,” a voice says at the end of the trailer, as Paulson’s character interjects: “Oh, I f–ing know what happened.”