Speaking to The Hollywood Reporter at an anniversary celebration for women's rights organisation Equality Now, Whedon brought up The Hunger Games in response to a question about writing strong women.
Whedon said: "I think [female characters] have been peripheral for a long time, and I think The Hunger Games is about to change that in a big way.
"I really like [the film], it's my kind of thing. And more important, I like what it's doing, which is millions."
The second film in the Jennifer Lawrence starring-Hunger Games trilogy, Catching Fire, is reportedly close to securing Francis Lawrence as its director.
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Watch a trailer for The Hunger Games below: