Characters:

Hero - Talia Blackford - played by Uma Thurman
 Talia is a mother of two children, and a wife to a husband who has gone to fight against the aliens. She is fairly old, however she is still strong, confident, heroic and courageous. These are all typical characteristics of a male hero, however she also has the characteristics that a female is stereotypically given, such as compassion, caring and intelligent. She has to save her husband...and the world, and must face a lot of challenges throughout the film, which she overcomes with these characteristics.

Princess - Ben Blackford - played by Brad Pitt

Ben is the male princess, and is captured by the aliens and needs rescuing by Talia. He has the typical characteristics of a male characters, however is still the princess. Once he gets captured, he is still able to help get rescued by Talia, as he uses his inteligence and resources to kill many of the aliens and help his rescue his fellow captured humans.

 Helpers - John Doeman - played by Bruce Willis

He is the older, very patriotich, "less agile" war veteran, who is determined to save America and prove that even old men can fight. He has stereotypes the female characters, Talia and particularly Sarah, as useless due to their sex. However he is proved wrong as he needs to be saved several times by both Talia and Sarah. He has got a personal hatred against the aliens, as they killed his wife, and this is shown in the film as he is very angry and violent, and wants to kill everyone one of the aliens.

Sarah Brown - played by Hayden Panettiere
She is the un-stereotypical female character, who only has very masculine traits, and is the "alpha-female", however still looks like a woman. She wants to help Talia as she simply wants to end the end of the human race. She builds a friendly battle between the sexes with John Doeman, and they are constantly trying to prove that their gender is better. Panettiere played Claire in the series "Heroes", where she also played a very strong female character who was determined to help others. The characteristics of her character Claire will be similar to those of Sarah Brown.


 
Donor - Herfred Wood - played by Shia Labeouf
He is the youngest person on Talia's team, and was not allowed to help because he was a lot younger than the other characters. After a lot of pleading,  he was allowed to help as he knows how to infiltrate into the alien base. He possesses a lot of intelligence, and is the "geek" of the team, and isnt strong at all.