Pope Leo XIV made a rock-star helicopter entrance to an open-air prayer vigil in Rome where over a million pilgrims gathered to see him.

Worshippers began crying and cheering when the white military helicopter descended over the vigil, where young worshippers from 146 countries assembled as part of a 'Jubilee of Youth'.

After entering on his classic popemobile on Sunday, the first American pope, 69, smiled and waved to the screaming crowds who had gathered to hear the Pope speak at the event.

'Aspire to great things, to holiness, wherever you are. Do not settle for less,' Pope Leo told the crowd.

The week-long 'Jubilee of Youth' - a highlight of the Jubilee holy year - was an enormous undertaking for the Vatican, with a half a million young pilgrims in Rome for most of the week.