The Kansas City Chiefs' quest for a historic Super Bowl "three-peat" against the Philadelphia Eagles kicked off on Sunday in front of U.S. President Donald Trump and pop superstar Taylor Swift, who led a crowd of A-listers in New Orleans.

Trump stood in private box seating during the playing of the national anthem, holding his hand to his head in salute, and the crowd booed and cheered when the president appeared briefly on the big screen.

Trump is the first sitting president to attend the NFL's title game.