PR firm Royal Brand Engineers also confirmed her death.
Kruger was born as Thapelo Lehuleri and has said in interviews that from an early age she identified with being a woman.
“I identify as a woman from a social level. I live my life like a woman on a day-to-day basis. But in terms of my ID‚ my driver’s licence and matric certificate and all those documentations of life‚ unfortunately they do still say male because the process [of gender transformation] in our country is not as easy as one may think it is.”
Tributes from fans and friends have dominated social media.