The Olsen twins are made up of Mary-Kate and Ashley Olsen. They are known to be the most successful child stars in the history of Hollywood because of their rise in the business industry with their fashion sense.

So how did they have the business sense to become successful in the industry?

Starting with social media - or lack there of, Glamour has it that the Olsens are probably the last remaining public figures who have no trace of social media whatsoever. They're smart enough to know that in this day and age of oversharing, less can be a whole lot more.

They also learned how to rebrand themselves. Rebranding is important when they wanted the market's attention to shift. They're known as child stars. So how do they change it? They learned techniques and always update themselves with the latest fashion design and trends. They know a lot about rebranding.

They made their business known internationally. They made sure to make a mark in London and France.

They made their chic-ness well-known. While there, the girls have to grapple with professionals from all over the globe while sharpening their negotiation skills.

Lastly, they shut down the haters. Their success since they started working as kids have already gathered a hoard of haters. People have always questioned their decision about becoming fashion designers. But Mary-Kate and Ashley held their heads high and now are the owners of at least $45 million worth of real estate.

The Olsen Twins' net worth combined exceeds $250 million, according to the Richest Clan. They don't stop working. They continue to invest in other ventures and exceed expectations in fashion with their designs and plans. And to make sure they are committed to their business, they don't plan on going back to acting. They want to focus their energy in their company.