Mona Geijer-Falkner was born on January 2, 1887 in Stockholm, Stockholms län, Sweden as Emilia Desdemona Geijer. She was an actress, known for Åsa-Nisse på semester (1953), Åsa-Nisse slår till (1965) and Åsa-Nisse i full fart (1957).
She was married to Hakon Wilhelm Falkner. She died on December 3, 1973 in Stockholm.
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