What is the fine-grained topic of the following text: MacFarlane is joined by an all-star cast including Academy Award®-winner Charlize Theron (Snow White and the Huntsman, Prometheus), Liam Neeson (Non-Stop, Taken), Neil Patrick Harris (How I Met Your Mother, Hedwig and the Angry Inch), Amanda Seyfried (Les Miserables, Mamma Mia), Giovanni Ribisi (Ted, Avatar) and Sarah Silverman (Wreck-It Ralph, The League). Only return the topic.
All-star cast of a film.