Melbourne, Mar 11 (ANI): Scarlett Johansson's belief in being ambitious drove her to touch the heights of success.

The American actress, who made her acting debut at the age of eight in a play with Ethan Hawke, revealed that she believes in ambition because it is not only healthy but is a factor necessary to be successful.

"Ambition is healthy. All people who are successful are ambitious. And you have to be ambitious to be successful. And you have to set goals for yourself. I think that's important," the Age.com.au quoted Johansson, as saying.

Meanwhile, 'The Other Boleyn Girl's novelist Philippa Gregory was impressed with the actress' full commitment to the historical accuracy of her character in the movie adaptation.

Gregory, who was employed as a historical consultant to help transform her book into the new Hollywood movie, was stunned at how determined the cast was to correctly portray the 16th century story, and singled out Johansson for special praise. (ANI)