Hubert du Plessis OMSG (7 June 1922 – 12 March 2011) was a South African composer, pianist, and professor of music whose career spanned several decades.

Along with Arnold van Wyk and Stefans Grové, du Plessis was one of the foremost South African composers of the 20th century.

Hubert du Plessis was born to an Afrikaner family on a farm called Groenrivier in Malmesbury in the Western Cape on 7 June 1922.

In 1943 he briefly worked for the South African Broadcasting Company in Cape Town, but soon after accepted a position with the department of music at Rhodes University, where he became a lecturer.

[2] Despite the strict laws against homosexuality in Apartheid South Africa, du Plessis was spared public disgrace and legal troubles by the government, and lived unashamedly as an outspoken and openly gay man.