Tom Grater International Film ReporterEXCLUSIVE: Riz Ahmed and Octavia Spencer have been cast in Invasion, a sci-fi thriller pic from BAFTA-winning UK filmmaker Michael Pearce (Beast).I can also reveal that Amazon Studios has taken worldwide rights to the project and will produce alongside American Animals outfit Raw and UK funder Film4, which backed development.The script is written by Pearce with Joe Barton (The Ritual).