Scarlett Johansson says she fought hard for her role in Iron Man 2.

The 25-year-old actress - who plays sexy Russian spy Black Widow in the superhero movie - admitted she actively campaigned for the part after actress Emily Blunt dropped out because of scheduling conflicts.

“I was a huge fan of the first movie and was quite ‘geek-ed’ out at being part of the second one. I just wanted to be a part of Iron Man so I really researched the comic books and came in with some ideas of my own about how to develop the character. I see her as being determined and ambitious,” she said.

Scarlett was anxious to get the part because she was keen to “kick ass” alongside her co-stars Gwyneth Paltrow, Samuel L. Jackson and Robert Downey Jr.

“I love everything about this character. She’s a total badass. I love every detail from her fabulous outfit to the wonderful hair. I mean, there’s nothing not to like about the character. She’s very bad and I think it’s rare that we get to see these sort of super heroines bought to the screen, where they’re really kicking some major ass, which she does,” Johansson added.