The "secret" teenage daughter of late mining heir and Voyager Estate founder Michael Wright has been awarded $25 million after challenging his will.

Olivia Jacqueline Mead claimed to have been left without adequate funds for her proper maintenance, support, education and advancement in life from her father's estate.

Olivia Mead leaves court after being awarded $25 million. Credit:Brendan Foster

Ms Mead, 19, had been left a $3 million trust fund, which she could access when she turned 30. During hearings over the past month she had hoped to secure $12 million, which was well short of her initial claim of $20 million. Her demands included some "fanciful" wish list items including a $250,000 diamond-encrusted bass guitar and money to look after a pet axolotl.

The teenager, who also famously said she needed $10,000 a year for handbags and fashion accessories, shook as Master Craig Sanderson told the court of his decision on Thursday morning, and then avoided talking to the media as she left the building.