The Price Is Right has aired over 9,000 episodes since its debut. The show has used several models, most notably Anitra Ford, Janice Pennington, Dian Parkinson, Holly Hallstrom, and Kathleen Bradley. In April 2011, George Gray became the announcer. Barker was accompanied by a series of announcers, beginning with Johnny Olson, followed by Rod Roddy and Rich Fields. Bob Barker was the series's longest-running host from its 1972 debut until his retirement in June 2007, when Drew Carey took over. The program premiered on September 4, 1972, on CBS. Contestants are selected from the studio audience: the announcer calls their name, invoking them to 'Come on down!', the show's famous catchphrase. A 1972 revival by Bob Stewart, Mark Goodson, and Bill Todman of their 1956–1965 show of the same name, the new version added many distinctive gameplay elements. The Price Is Right is an American television game show where contestants compete by guessing the prices of merchandise to win cash and prizes.