po_TellerTeller, born February 14, 1948, is an American magician, illusionist, actor, comedian, writer, director and usually silent half of the comedy magic duo Penn & Teller, along with Penn Jillette.

Teller is an atheist, debunker, skeptic, and a fellow of the Cato Institute (a free market libertarian think tank which also lists his performing partner Penn Jillette as a fellow), an organization which featured prominently in the duo’s Showtime television series Bullshit!. Teller does not have a last name; his name is simply “Teller”. Teller has legally changed his original polynym, Raymond Joseph Teller, to the mononym “Teller” and possesses a United States passport issued in that single name.