Hundreds of thousands of young faithful feted Pope Leo XIV like a rock star Saturday at an open-air prayer vigil outside Rome, after the head of the Catholic Church made a dramatic entrance by helicopter.

Up to a million young Catholic believers are expected Saturday for a nighttime vigil led by Pope Leo XIV, the culmination of a weeklong pilgrimage, a key event in the Jubilee holy year. The “Jubilee of Youth” — when the Vatican invites Catholics ages 18 to 35 to the seat of the global Church’s power — has seen thousands of young pilgrims from around the world flood Rome this week.