Kate Walsh was on a television show.
Kate Walsh (actress) . Her roles include Dr. Addison Montgomery on the ABC television dramas Grey 's Anatomy and Private Practice , Rebecca Wright on the short-lived NBC sitcom Bad Judge , and Olivia Baker on the Netflix drama series 13 Reasons Why . Kate Walsh ( born 17 June 1981 ) is an English television presenter and former licensing development manager who came to the public 's attention in March 2009 whilst appearing as a candidate in the fifth series of The Apprentice . She co-hosted the Channel 5 evening entertainment show Live from Studio Five from its launch in September 2009 until the final edition on 4 February 2011 . She also presented the Live from Studio Five replacement OK ! Walsh left the show on 16 August 2011 along with co-host Matt Johnson .