The film will be drawing from Spielberg's experiences when his family lived in Arizona in the late 1950s and '60s, which coincided with his earliest experiments with making home movies. Spielberg has three younger sisters, the oldest of which, Anne, followed her brother into feature filmmaking, working at his production company Amblin Entertainment, before co-writing the 1988 comedy 'Big' with Gary Ross. Butters' character, however, is her own creation, not based on a specific sibling.