While shooting scenes for her upcoming movie The Rhythm Section, a film about a woman seeking revenge for the death of her family, Blake underwent a make-under to channel her character.
The actress was unrecognisable in a short and shaggy bronde wig, which she later covered up with a blue knitted beanie. Also on trend for actresses in the street this season appears to be casual purple trackpants and various daggy jackets... also known as the regular person's weekend ensemble.
Take a peek at her new look below...
This article originally appeared on InStyle Australia.