Teller (born Raymond Joseph Teller; February 14, 1948) is an American magician, illusionist, comedian, writer, and the frequently silent half of the comedy magic duo Penn & Teller, along with Penn Jillette. He legally changed his name from "Raymond Joseph Teller" to just "Teller". He is an atheist, debunker, skeptic, and Fellow of the Cato Institute (a free market libertarian think tank which also lists his partner Penn Jillette as a fellow). The Cato Institute Association is featured prominently in the Penn and Teller Showtime TV series Bullshit!.