The Television presenter reference article from the English Wikipedia on 24-Apr-2004
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Television presenter

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A television presenter (Brit.) is a celebrity who is best known for introducing or appearing in television programmes. They will often be known for this alone and have no particular expertise. A television presenter may double as an actor, singer, etc, but is normally known to the public only as the presenter of a particular programme or programmes. Exceptions include many presenters of political or scientific programmes who often are professionals in the relevant field.

In the USA, such a person is typically called a host or an emcee.

See List of television presenters.