Johnny Brennan is an American voice actor, comedian, and writer, best known for his work on the radio show and animated series called The Jerky Boys. He gained fame in the 1990s for his prank phone calls, which became popular for their humor and creativity. Brennan's unique style involves using various characters and voices, making his calls entertaining and memorable. In addition to his work with The Jerky Boys, he has also contributed to other projects in television and film, showcasing his talent in voice acting and comedy.