According to sources, more than 100 people participated in the marriage ceremony held at Kumaraswamy's farmhouse in Kethaganahally, Ramanagara.
There were around 50-60 members from former Prime Minister HD Deve Gowda's family and more than 30 people participated from Revathi's family, sources added.
This comes in the middle of a nationwide lockdown which has been imposed to deal with the coronavirus threat.
Earlier, HD Kumaraswamy had said that the marriage ceremony would be held behind closed doors in the presence of family members.
Nikhil Kumaraswamy, who contested the Lok Sabha election from Mandya, is also the national youth wing president of Janata Dal-Secular.
( With inputs from ANI )