MacDonald var blant de best betalte skuespillerne i 1920, og tjente ca $50 000 per film etter en kontrakt med First National. Hun oppnådde toppen av sin popularitet mellom 1920 og 1923. Men hun ble ansett som en av mindre talenter i filmindustrien, selv om hennes veldreide figur resulterte i kallenavnet «American Beauty».[4]
^The Ultimate Directory of the Silent Screen Performers: A Necrology of Births and Deaths and Essays on 50 Lost Players; edited by Anthony Slide, Scarecrow Press, c.1995
^The Ultimate Directory of Film Technicians; A Necrology of Dates and Places of Births and Deaths of More than 9,000 Producers, Screenwriters, Composers, Cinematographers, Art Directors, Costume Designers, Choreographers, Executives and Publicists; Scarecrow Press, 1999
^Larry Lee Holland, "Mary MacLaren and Katherine MacDonald" Films in Review (1985) s. 221-227