Karl Gustav Vollmöller was a German philologist, archaeologist, poet, playwright, screenwriter, and aircraft designer. He is most famous for the elaborate religious spectacle-pantomime The Miracle and the screenplay for the celebrated 1930 film The Blue Angel, which made a star of Marlene Dietrich.

The Miracle is a 1911 wordless play written by Karl Vollmöller, from which three movie versions were adapted. The play launched the career of the author's wife Maria Carmi, who went on to star in 25 silent films.