Dakota Fanning and her little sister, Elle, were set to star alongside Cameron Diaz in the movie My Sister’s Keeper. The film is about a young girl who sues for emancipation from her parents after she learns she was only conceived as a genetic match for her sister who is sick and dying.
Dakota was set to play the older sister, with Elle cast as her younger sister … strange how art imitates life! The only problem is that Dakota found out she would have to shave her head for the role. She balked at this and pulled out of the movie, taking her little sis with her!
The two will be replaced by Abigail Breslin and Sofia Vassilieva.
Source: Wicked Youth

I don’t blame Dakota to be honest!