Why Are Ambassadors Called Excellency?

(formal) A title of respect for males used when referring to heads of state, heads of government, governors, ambassadors, ecclesiastics such as Catholic Bishops, Nuncios, royalty and those of equivalent rank.

Are ambassadors referred to as His Excellency?

You use expressions such as Your Excellency or Her Excellency when you are addressing or referring to officials of very high rank, for example ambassadors or governors.

How do you address an ambassador His Excellency?

Ambassadors are addressed as Mr. /Madam Ambassador or Ambassador Jones. Only by special invitation or long friendship should one address an ambassador by first name and then only when not in the public eye.