Joshua Kushner and Chris Paik are only in their 20s, but they are already amongst NYC's top venture capitalists. The Thrive Capital team invests in NYC startups like Fab, Kickstarter and Warby Parker. They also got in on Instagram right before its mega-acquisition by Facebook ( FB).

The son of real estate developer Charles Kushner, Joshua Kushner is dating Victoria's Secret model Karlie Kloss and his brother Jared is married to Ivanka Trump.

It was at Harvard Business School where Katia Beauchamp and Hayley Barna met, laying the groundwork for what would become one of the hottest beauty startups. The duo launched New York-based Birchbox in 2010, a popular service which subscribers a gift box of new products every month. From hair products to nail polish, Birchbox users get to try the latest samples.

Investors include First Round Capital, Lerer Ventures and Gary Vaynerchuk.

If you liked this article you might like

5 Apps for Meeting People

10 Best Uses for 3D Printing

The 5 Hottest Things in Wearable Tech

Facebook's Sandberg Highlights Women in Tech