Julianne Moore, John Cusack andMia Wasikowska also star in the David Cronenberg directed film, which follows a mysterious celebrity obsessed woman (Wasikowska) who begins working in LA for haywire actress Havana (Moore).
Stories and lives soon begin to intertwine with teen actor Benjie (Evan Bird), his 'Momager' (Olivia Williams) and his father (Cusack).
Pattinson had previously worked with Cronenberg on Cosmopolis, which he played a troubled billionaire just trying to get a haircut in.
Maps to the Stars is out in the UK September 26.
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