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The title alludes to the popular 1925 song I Lost My Heart in Heidelberg composed by Fred Raymond with lyrics by Fritz Löhner-Beda and Ernst Neubach. The film taps into the nostalgic reputation of Old Heidelberg.
as Pastor Schönhoff
as Sophie
as Rudolf
as Charolotte
as Fritz Merkelbach
as Alex Winkler
as Georg Schröder
as Klärchen
as Engineer Frank
as Trude
as Bornschläger
as Master tailor Stenglein
as Fritz Merkelbach