Pope Leo XIV will be the Catholic Church's 267th leader.
VATICAN CITY -- The temporary chimney atop the Sistine Chapel released a plume of white smoke on Thursday evening local time, signaling that the 133 cardinals working inside had reached a two-thirds majority to elect a new pope for the Catholic Church.
American Cardinal Robert Prevost was shortly thereafter announced as the 267th pontiff. He chose the name Leo XIV, a senior cardinal deacon announced.
The 69-year-old Chicago native is the first American pope and is seen as a diplomat in the church.
"This is the first greeting of the risen Christ. May the peace be with you," Leo said in Italian in his first remarks as pope. "This is the peace of the risen Christ."
(The Associated Press and ABC News contributed to this report.)
Pope Leo XIV - history-making, the first American Pope. Now, David Muir reports from the Vatican in the breaking, new "20/20" special edition. Watch the premiere of "The American Pope | Leo XIV" tonight at 9/8c on ABC. Stream on Hulu and Disney+
Cardinal Robert Prevost, an American missionary who spent his career ministering in Peru and leads the Vatican's powerful office of bishops, was elected the first American pope in the 2,000-year history of the Catholic Church.
Prevost, 69, took the name Leo XIV.
A marching brass band in blue uniforms led a contingent of Swiss guards through the crowd to a central spot below the balcony, generating another huge roar from the crowd.
The Pontifical Swiss Guard is the official security force of the Vatican, and holds a ceremonial and a protective function.
And now more marching bands are celebrating the election of a new pope in a parade that includes large groups in military dress uniforms.
"Vivi il Papa!" erupts from the crowd whenever the music pauses.
That's where a cardinal will soon emerge to "to proclaim a new pope to Rome and to the world."
There is incredible excitement - the crowd is roaring, and some are shouting "hallelujah!"
Thousands of people have gathered in Vatican Square to witness the first appearance of the newly elected pope.
White smoke was released from the chimney atop the Sistine Chapel on Thursday evening, signifying that the 133 voting cardinals reached a two-thirds majority to chose the next leader of the Catholic Church.
Crowds cheered as the smoke emerged and the bells of St. Peter's Basilica rang.
The new pope is expected to address the crowd next to the iconic red velvet curtains lining the central balcony of the basilica.
