Oprah credits Williams for her success

Talk show queen Oprah Winfrey credits comedian Robin Williams with making her TV's biggest star - because an interview they recorded as young up-and-coming talents helped land her a top job.

In Winfrey's new book, 'O's Big Book of Happiness', she reveals how her high-spirited chat with the energetic funnyman - back when she was just 24 - helped convince network bosses to hand her her first talk show.