Alison kicking Ben out of her car on the way to the clinic was based on a real-life incident in which Mann kicked Apatow out of her car. Anne Hathaway was initially cast to play Alison in Knocked Up , but she dropped out due to creative differences with director Judd Apatow. Christina Aguilera turned down the role so that she could focus on her musical endeavors. By the end of Knocked Up , Ben and Alison have emotionally matured and put their differences aside to make a relationship work and raise their baby together. As with any Judd Apatow production, a lot of the dialogue in Knocked Up particularly between Ben and his friends was improvised by the actors on the set. Initially, in pre-production on Knocked Up , director Judd Apatow planned to go a little guerrilla with the birth scene and use footage of a real birth.
It follows the repercussions of a drunken one-night stand between a slacker and a just-promoted media personality that results in an unintended pregnancy. Ben Stone is a laid-back and sardonic Canadian immigrant who lives off injury compensation funds and sporadically works on a celebrity porn website with his stoner roommates. While celebrating her promotion, Alison meets Ben at a local nightclub. After a night of heavy drinking, they end up having sex without protection due to a misunderstanding. The following morning, they quickly learn over breakfast that they have little in common and go their separate ways.
Sign In. Edit Knocked Up Ben Stone Katherine Heigl Alison Scott Paul Rudd