A number of the dialogs were improvised by the actors, notably the things said by Sammy (克里斯·庞蒂斯) to Cleo (艾丽·范宁). This was done in order to provoke genuine surprise from Fanning. Pontius, in fact, was specifically chosen for his improvisation skills, as well as his good rapport with children.
Executive producer 弗雷德·鲁斯 suggested the casting of 艾丽·范宁. Her performance in 本杰明·巴顿奇事 (2008) impressed Roos. 索菲亚·科波拉 was initially reluctant however, believing Fanning to be a typical, professional Hollywood child actress, but agreed to meet her, and was won over.
The film's 'Golden Lion' win at the Venice International Film Festival was highly controversial, with some people questioning President of the Jury 昆汀·塔伦蒂诺's objectivity due to 索菲亚·科波拉 being a former girlfriend of his.
Cleo is talking to Johnny about a vampire book she is reading which sounds a lot like 斯蒂芬妮·梅耶's popular young adult book "Twilight". Cleo is played by 艾丽·范宁 whose sister 达科塔·范宁 plays Jane in three of the 暮光之城 (2008) Saga films.
Stephen Dorff received the invitation to play Johnny Marco on the exact anniversary of his mother's death. He said he felt that it was a sign from her that it was a role she would have wanted him to do.