KT Sullivan is an American singer and actress known for her performances in cabaret and musical theatre.
Sullivan performs her cabaret act in venues such as the Firebird Cafe and the Oak Room at the Algonquin Hotel in New York City, the Plush Room and the Third West Coast Cabaret Convention in San Francisco, and Pizza on the Park in London.
All the Things You Are, Sullivan's 2008 cabaret show at the Oak Room, featured the work of Jerome Kern. In October 2008, she and frequent partner Mark Nadler performed their cabaret act Cole Porter & Friends at the South Orange Performing Arts Center in South Orange, New Jersey.
On Broadway, Sullivan appeared as Suky Tawdry in the 1989 revival of The Threepenny Opera and as Lorelei Lee in the 1995 revival of Gentlemen Prefer Blondes. She toured in Annie Get Your Gun with Cathy Rigby and also performed in Sugar and Born Yesterday. She, Mark Nadler, and Ruth Leon wrote American Rhapsody: A New Musical Revue, which she and Nadler performed at the off-Broadway Triad Theatre between November 2000 and June 2002. The musical was nominated for the Lucille Lortel Award for Outstanding Musical of 2001 and the Drama Desk Award for Outstanding Musical Revue of 2000-2001 and won the MAC Award for Best Musical Revue. She also appeared in the New York City productions A... My Name Is Alice in 1984 and 1992 and Splendora in 1995, and performed in the Musicals Tonight concert presentations of So Long, 174th Street and By the Beautiful Sea in 1999 and Fifty Million Frenchmen in 2006.
In regional theatre, Sullivan appeared in You Never Know in 1996 at the Papermill Playhouse in Millburn, New Jersey, and she has performed at the Old Globe Theatre, the Hartford Stage Company, the Municipal Opera of St. Louis, the Goodspeed Opera House, and the Great Lakes Theater Festival.
In the West End, Sullivan appeared in Vienna to Weimar in 2004 and has performed in revues celebrating the songs of Noël Coward and Irving Berlin.