An Imaginary Report on an American Rock Festival (Hungarian: Képzelt riport egy amerikai popfesztiválról) is a Hungarian musical by composer Gábor Presser, lyricist Anna Adamis and book writer Sándor Pós based on the short novel of the same name by Tibor Déry. The musical premiered in 1973, and being the first successful Hungarian rock musical (and also Presser's first theatrical work) opened the way for popular music to Hungarian theatres and literature. It is set in a U.S. rock festival and tells a story of a married Hungarian immigrant couple.