The duo play sisters in the film the Other Boleyn Girl
She told W magazine: "The only thing that's a little bit annoying is that I feel that I come off kind of boring sometimes."
Scarlett jumped to her defense, proving the two have forged a strong bond over the year.
Scarlett replied: " I don't think you're boring."
Judging by Natalie's display, it looks as if fans won't think so either.
The Other Boyleyn Girl sees the girls playing sisters Mary and Anne Boyleyn in the film adaptation of Philippa Gregory best-selling novel about their relationship with King Henry VIII.