Frank Caliendo

Frank Caliendo (born January 19, 1974) is an American comedian and impressionist, best known for his work on the Fox Networktelevision series MADtv, and as the in-house prognosticator for Fox NFL Sunday. In 2007 and 2008, he performed his impersonations on his own show, Frank TV, which aired on TBS. He is known for his impressions of Charles Barkley, NFL color commentator John Madden, sportscaster Jim Rome, comedian Robin Williams, actors Morgan Freeman and William Shatner, and United States Presidents George W. Bush and Bill Clinton, and for his frequent appearances on The Bob & Tom Show.

He voices Sergei in Gravity Falls.