updated 05/06/2011 AT 2:00 PM ET
•originally published 05/10/2011 AT 8:00 AM ET
Oprah Winfrey is in a nostalgic mood these days.
The TV personality, whose illustrious 25-year run as host of The Oprah Winfrey Show is coming to an end in a matter of weeks, is looking back on her impressive career – with the help of her BFF Gayle King.
In the opening feature on the special celebratory June issue of O, The Oprah Magazine, King, 56, and Winfrey, 57, trace some of the milestones in the media mogul’s rise to the top, and only PEOPLE.com has the exclusive quotes.