The self-help guru who got his start thanks to Bill Guthy and Greg Renker, Robbins is a best-selling author, highly-paid corporate speaker, and adviser to politicians and leading athletes. He may also be the most physically imposing person to have ever graced late-night TV, the result of a hormonal condition. He was born with the name Anthony Mahavorick.

Video: From A&E’s Biography series:

Video: Ben Stiller’s brilliant imitation from the early 1990s: