The youngest female billionaire in the world is Lynsi Torres, the 30-year-old owner and president of the popular California-based fast-food chain In-N-Out Burger, according to a report by Bloomberg.

Torres, whose grandparents opened the original In-N-Out Burger drive-through in 1948, has rarely been seen in public and refuses to do interviews. Bloomberg estimates the private company could be worth anywhere from $1 to $2 billion.

Take a look at these pictures of the $17.4 million California mansion Torres bought last year.