He might have appeared as a guest on a primetime TV chatshow, but Prime Minister John Key's still an unknown to some in the US.

Mr Key was labelled an "unidentified guest" in a New York Daily News slideshow of world leaders at Nelson Mandela's memorial service.

"British Prime Minister David Cameron (R) laughs with an unidentified guest as he attends the official memorial ceremony for late South African president Nelson Mandela at FNB Stadium in Johannesburg, South Africa," the caption read.

China's Vice President Li Yuanchao, Cuba's President Raul Castro and Chelsea Clinton, daughter of former US President Bill Clinton were all identified.


Mr Key, who has appeared on the Late Show with David Letterman led the official New Zealand delegation to South Africa which included opposition leader David Cunliffe, Maori Affairs Minister Pita Sharples, former Prime Minister Jim Bolger, and former Foreign Minister Sir Don McKinnon.

Mana Party leader Hone Harawira has flown to South Africa to pay his respects of his own volition.

Read more:
Obama thrills crowd as he honours Mandela
Jacob Zuma booed at Mandela's memorial
Obama shakes hands with Cuba's Raul Castro
Selfie at Mandela's service draws criticism