Whose Line Is It Anyway? is an American improvisational comedy television series. It is an adaptation of the British series of the same name. It originally aired on ABC from August 5, 1998 to September 4, 2004 and ABC Family from January 17, 2005 to December 15, 2007, hosted by Drew Carey. A revival of the show, hosted by Aisha Tyler, aired on The CW from July 16, 2013 to November 1, 2024.
Colin Mochrie and Ryan Stiles have been permanent performers on the show since Season 1 (though illness caused Stiles to miss two episodes of Season 10), while Wayne Brady, after appearing in several episodes of Season 1, has been a permanent performer since Season 2 (with the exception of a few episodes in Season 8). The remaining of the four seats are occupied by a guest panelist. Prior to the American series, Mochrie, Stiles, and Brady had all appeared on the British series, as did Greg Proops, Chip Esten, and Brad Sherwood, who are among the most frequent fourth performers on the American series.
In May 2024, the show was renewed for a twenty-first season which premiered on September 6, 2024.
