Scarlett Johansson insists she "worked her a*s off" for success.

The 25-year-old actress has hit back at critics who claim she only won her Tony Award for Best Featured Actress in a Play for her role in Broadway show 'A View From the Bridge' because of her Hollywood fame, insisting she was cast for her abilities.

She said: "A lot of my friends who are struggling actors are going through the same thing. But I can't apologise for it. I have worked my a*s off to get to where I am so I understand that struggle.

"For me, it's more about hiring the right person for the job. If somebody is cast because they are a name but they're not right for the job, well, it's very frustrating."

The 'Lost In Translation' star's win has inspired an internet campaign group, 'Give The Tonys Back To Broadway', and though she understands the frustration from theatre actors, Scarlett insists Hollywood stars bring their own assets to the stage.

She explained to Broadway World: "The actors we've seen this season that we recognise from film -- Denzel Washington, Viola Davis, Liev Schreiber and Catherine Zeta-Jones, etc. -- have not only made a huge impact on ticket sales but have given tour de force performances and all started their careers as stage actors, dedicating themselves to making an impression in the theatre.

"This goes to show that actors are actors, whatever the outlet, and with perseverance and drive, can cross the boundaries of the medium."