goodwill ambassador
honorific title, occupational position, and/or designation of a person who advocates for a specific cause or global issue on the basis of their notability
en-US/ˈɡʊdˈwɪl æmˈbæsədɚ/
en-GB/ˈɡʊdwɪl əmˈbæsədə/
honorific title, occupational position, and/or designation of a person who advocates for a specific cause or global issue on the basis of their notability