The `We Bought A Zoo` actress - who plays zookeeper Kelly Foster alongside Matt Damon in the new movie - admitted she is "up for every kind of challenge" and likes to get stuck in when she takes on a new role.
She said: "I think I`m up for every kind of challenge and I like to get down and dirty, yes. I really liked that aspect of Kelly, that she is a no-frills kind of girl, very grounded and practical, with that salt of the earth quality.
"That`s the body language I created for her too; she`s comfortable in her body and in her stance."
However, the 27-year-old beauty - who divorced actor Ryan Reynolds in December 2010 after two years of marriage - explained she has developed a "hard shell" in order to cope with the constant "batterings" she has suffered in the film industry.
Scarlett added: "I learned at a really young age that you have to have something of a hard shell to take some of the batterings that you get in this industry.
"We`re constantly rejected and scrutinised and it`s important to take a lot of it with a pinch of sale in order to be able to survive and press on."