A24 announced today that Jamie Stewart of Xiu Xiu and Matmos have joined Nico Muhly to compose original music and songs for the upcoming sci-fi comedy How to Talk to Girls at Parties. The film will be directed by John Cameron Mitchell (Hedwig and the Angry Inch, Rabbit Hole) and is set to star Elle Fanning, Nicole Kidman and Alex Sharp. The movie is based on a short story by Neil Gaiman and follows a teenage punk rocker in 1970s suburban London who sneaks into a party with his friends where they meet a group of intensely attractive, otherworldly girls from outer space.