Geena Davis's commitment to gender in the media is truly inspiring. See Jane, an affiliated program with her Institute on Gender in the Media, focuses specifically on making sure that children's media has a balanced and varied portrayal of female characters. The below trailer illustrates some of their research findings.
Here's our write-up of the research: Sexism Watch: Po;ular Media is Dominated by Men
For more information on Davis's work, visit the institute's site.