No. 1: Mary Kate & Ashley Olsen
Net worth: $150 million
Mary-Kate Olsen and Ashley Olsen really hit it big. According to IMDb, they became the youngest self-made millionaires in American history before they were 10 years old. In 2007, they were on “Forbes’ Richest 20 Women in Entertainment” list with a combined net worth at about $100 million. And the twins have branched out even more since then, with their own clothing line, magazine, and a website called StyleMint. They also own Dualstar Entertainment, which sells $1 billion worth of merchandise every year.