Penn Jillette and Teller are American illusionists and entertainers who have performed together since the late 1970s. They are known for their numerous stage and television shows. Their current Las Vegas show is a mix of illusion and comedy. They specialize in gory tricks, exposing fraud, explaining magic tricks and performing clever pranks. In recent years they have become notable for their atheism and scientific skepticism through segments on their TV show Penn & Teller: Bullshit.