Actress Scarlett Johansson says she was scared acting with co-star Anthony Hopkins in movie Hitchcock as she could not forget his serial killer role in 1991 movie Silence Of The Lambs.

The recently released movie stars Hopkins as Alfred Hitchcock and Johansson as Janet Leigh.

"You have to be brave to get into the shower and face Anthony Hopkins as Hitchcock jabbing you in the face with a 12-inch kitchen knife," Star magazine quoted Johansson as saying.

"As much as he is a pussycat, Anthony is terrifying. Maybe I watched Silence Of The Lambs too much when I was a kid," she added.