Guest host

A guest host (or guest presenter in the United Kingdom) is a host, usually of a talk show, that substitutes for the regular host if they are, for example, ill or have other commitments. Although guest hosts are often undesirable, some shows have seen the guest host do a better job than the main host, and filling in as a guest host has helped to launch the careers of a variety of television and radio talents. In U.S. radio, the concept of a guest host is known as a "swing jock". This phrase was popularized on The Tonight Show during Johnny Carson's 30-year reign as host from 1962 to 1992. Toward the end of his tenure, Carson was granted more personal time off, and substitute hosts would be seen on the air more often. "Permanent guest...