The Sound of Musicals was a 2006 four part BBC series starring several different musical theatre actors and some other professional singers who performed acts from different musicals. Each week the standard cast was joined by a celebrity guest host who also performed their favourite numbers. The show also featured interviews with people involved in musical theatre such as Andrew Lloyd Webber, and Cameron Mackintosh. It aired weekly (every Saturday) for four weeks starting Saturday 14 January 2006.