Stanley Tucci Ethan Skate Lutz Mackensy Ke Huy Quan Dr. Amherst Viktor Neumann Chris Castaldi Dr. Jones Norman Matt Millie Bobby Brown Michelle Carlotta Pahl Rory Keane Howard Sven Plate Chris Pratt Keats Leonhard Mahlich David Alexander Dave Michael Roll Martin Klebba Herman Michael Iwannek Giancarlo Esposito Marshall Frank Röth Michelle Yeoh ? Arianne Borbach Billy Bob Thornton ? Gudo Hoegel Brian Cox ? Roland Hemmo Jenny Slate ? Ilona Otto Jason Alexander ? Tobias Meister Anthony Mackie ? Jan-David Rönfeldt