While directing Loverboy, Kevin Bacon decided to cast his daughter Sosie in the film. Asked about the choice to cast his daughter, Kevin said he made the decision as a Director, not as a father, because he believed his daughter was perfect for the role and that "Sosie was cool. She kind of got it out of her system. She said, 'Oh, that was fun—now I’m going back to school.'" Sosie portrayed the main character Emily in a flashback, while the adult Emily was portrayed by her mother Kyra Sedgwick. As Emily, she sang an a cappella version of the David Bowie song "Life on Mars?" that was described in a review from The New York Times as "grotesquely funny." Her brother, Travis Bacon, was cast in a smaller role in the film. Kevin praised her work on Loverboy, but said he would not be encouraging her to pursue acting further.