[1][2] She has an older sister Lee-Anne Keet [simple] who was also an international water polo player and was also part of the South African national team.

[3] Marcelle Keet studied at the Clarendon High School for Girls in East London, Eastern Cape, South Africa.

Marcelle Keet was part of the South African field hockey team at the 2010 Commonwealth Games in Delhi, India, where they finished 4th.

Marcelle Keet was part of the South African water polo team at the 2013 World Aquatics Championships in Barcelona, Spain, where they finished 15th.

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