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Before Mark Zuckerberg was the fifth-richest person on earth and one of the most powerful CEOs, he was a teenager who aspired to study at Harvard.

He ended up dropping out to work on Facebook, but next week he'll return to give this year's commencement address and receive an honorary degree.

Thanks to a video taken by his dad and shared on Facebook, you can watch the moment Zuckerberg found out he was accepted to Harvard. Clad in his pajamas and surrounded by chunky computer monitors next to his bed, Zuckerberg opens the email confirming his admittance.

"Yay," Zuckerberg says softly. "I got accepted."

Watch the full video: