Arthur Gropp

Arthur Gropp is credited as Marvin Siewers in the 2024 film Alles gelogen. The role represents Gropp’s documented appearance in a feature-length production, marking one of the few publicly listed credits associated with the name in film records. The film’s title translates to "All Lies" in English, indicating a narrative centered on deception or misdirection, though further details about the character or production remain unverified beyond this credit.

Gropp’s involvement in Alles gelogen is the only credited work on record for the name in relation to the film industry as of the available data. The appearance suggests participation in a narrative-driven project, though specifics about the department, role type, or contributions are not provided in the verified information. The film’s rele…