Margot Robbie took her craft to a whole new level during the filming of Once Upon a Time in Hollywood.

During a sit-down interview with Today, the actress opened up about what it was like to play Sharon Tate, who was murdered in 1969 by Charles Manson’s followers.

“Whenever I heard her name, I really only thought about her life,” she shared, adding that she had never been “exposed to parts of her life when she was alive.”

Margot also revealed that she was given some of the late actress’ jewelry to wear in the film by Sharon’s sister Debra Tate.

“It was kind of sometimes very sad to be that closely connected with real-life Sharon,” she remarked, adding that at moments, “suddenly the tragedy of it all would hit you and you’d be tremendously sad.”

Watch the interview below: