AN ABORIGINAL elder who was part of the stolen generations claims she has DNA evidence to prove she is billionaire Gina Rinehart's half-sister.

Hilda Kickett, who has long claimed to be Lang Hancock's illegitimate daughter, last night said the Rinehart family were behaving like ''village idiots'' but denied she wanted a stake of their fortune.

Hilda Kickett now claims she has DNA evidence to prove she is Gina Rinehart's half-sister. Credit:A Current Affair

Speaking on the Nine Network, Mrs Kickett said the late mining magnate had had an illicit affair with an Aboriginal cook on his property at Mulga Downs and had told her ''many times'' that he was her father.

''I went down a different path but I like the way I have turned out,'' she said.