Brothers of Pope Leo XIV share more about how he was shaped by his faith at an early age.

Less than 24 hours after being introduced as pope, Leo XIV celebrated his first mass and spent time with the faithful, giving out blessings.

David Muir shares some of the most memorable images of the past two days after the historic election of the first American pope.

In his first mass since becoming pope, Pope Leo XIV reaffirming his pursuit for unity as many describe him as a bridge builder.

Francis Rooney, former U.S. Ambassador to the Holy See, reflects on the time he spent with Cardinal Robert Prevost before he was elected as Pope Leo XIV.

Pope Leo XIV's family tree reflects America's complex racial history, according to records obtained by ABC News.

Despite historic gains under Pope Francis, women remain excluded from the Catholic Church's highest levels of decision-making.

Genealogist and founder of Unearthing Your Roots, Chris Smothers, traced Pope Leo XIV's family tree which showed a reflection of America's complex racial history.

Friend of Pope Leo XIV, Father Robert Hagan, joined ABC News Live to talk about what to expect from the new American born pontiff.

Pope Leo XIV is registered to vote in the United States and has previously voted in some Republican primaries, but he is not registered as a member of a political party.

Harry Styles was photographed by eagle-eyed onlookers in Rome on Thursday as Pope Leo XIV was elected the new pontiff.

Following the election of Pope Leo XIV, the first pontiff elected from the U.S., American cardinals shared their reaction to the new leader of the church.

Sister Barbara Reid, president of the Catholic Theological Union, celebrated Pope Leo XIV as the first pope chosen from the U.S.

The newly elected Pope Leo XIV could continue in his predecessor's footprints as the steward of the environment of the Catholic Church.

Timothy Dolan, archbishop of New York, said he did not think the fact that Pope Leo was from the U.S. "carried much weight" in the decision to elect him as the leader of the Roman Catholic Church.

Kevin Hughes, chair of theology and religious studies at Villanova University, discusses Pope Leo XIV’s alma mater celebrating Robert Prevost becoming pontiff.

Somos Community Care founder and chairman Dr. Ramón Tallaj talks about the similarities between the two pontiffs.

When Cardinal Robert Prevost was in the first grade, his neighbor told him he would be the first American pope, his brother told ABC News.

Rev. Mark Francis was a former high school and college classmate of Robert Prevost, the man who would become Pope Leo XIV.

Anna Rowlands says the new pontiff “couldn’t stop smiling” when she met him on Thursday.

Prior to being elected, Pope Leo XIV had a presence on X, where he sometimes shared messages that appeared to be critical of some of President Donald Trump's policies.

When news broke Thursday about Robert Prevost's election as the first American pontiff, Pope Leo XIV, the mood throughout Chicago was joyous.

The mayor of Pope Leo’s hometown of Chicago called his election “one of the biggest moments in modern history” of the city.

ABC News’ Matt Rivers reports from Peru, where Pope Leo XIV spent much of his career as a missionary.

Chicago-born Robert Francis Prevost is the first American to lead the Catholic Church.

John Prevost reacts to his younger brother Robert Prevost making history as the first American pope and opens up about their relationship and upbringing.

American-born Cardinal Robert Francis Prevost, now Pope Leo XIV, celebrated his first mass as the new leader of the Roman Catholic Church.

Over an hour after the white smoke emerged, the new pope, clad in his papal vestments, stepped out onto the balcony and greeted the world.

Noelle Neis, who went to the same parish as Pope Leo XIV as a child, says the pontiff was "very intelligent" and "very kind."

Eighteen days after Pope Francis last appeared on the balcony of St. Peter's Basilica, his successor -- the 267th pope -- emerged.

Long before he made history as Pope Leo XIV, Robert Prevost walked through the halls on Villanova’s campus in the 1970s as a promising math major before going on to become a priest.

In a post on X, President Donald Trump called Pope Leo XIV’s election “a Great Honor for our Country” and that he looked forward to meeting the new pontiff.

Cardinal Maung Bo, the archbishop of Yangon, told ABC News’ James Longman that he hopes Pope Leo XIV will be able to "build a bridge" with President Donald Trump.

Rev. James Martin discusses how Pope Leo’s views compare to those of Pope Francis, the significance of his name and his reaction to the first American pope.

Pope Leo XIV, the first American pope in Catholic history, is reportedly less outgoing than his predecessor.

Pope Leo XIV celebrated his first mass as pope at the Sistine Chapel in Vatican City.

When news broke Thursday about Robert Prevost's election as the first American pontiff, Pope Leo XIV, the mood throughout Chicago was joyous.

ABC News' Terry Moran spoke with two priests who share what the next chapter of the Catholic Church could look like following the election of the first American pope.

Family and friends share personal insights on Pope Leo XIV as Americans react to the history-making pontiff.

Pope Leo XIV began his first homily at the Sistine Chapel in English on Friday, inviting people to "recognize the marvels that the Lord has done."

Americans are cheering for the new leader of the Catholic Church, Pope Leo XIV, whose name is Robert Francis Prevost.

Pure shock and joy fell upon the crowd filled with people from all over the world in St. Peter’s Square as Pope Leo unexpectedly stepped out on the balcony as the next pontiff.

ABC's Alex Perez speaks to the brothers of Pope Leo XIV as they react for the first time to their baby brother's new appointment as the first American Pontiff in the Catholic Church's history.

ABC News’ Linsey Davis spoke with a childhood friend of Pope Leo XIV about the pope’s historic election and his life before the clergy.

ABC News’ Linsey Davis spoke with a former high school and college classmate of Pope Leo XIV. The Rev. Mark Francis recounts the type of student the new pope was and their recent reunion in Chicago.

The pope's brothers speak about his childhood, missionary work and why the family said they expect him speak his mind on thorny issues like immigration.

Pres. Trump called the election of Pope Leo XIV, "a great honor for our country," and looks forward to meeting the Chicago-native.

ABC News contributor and Catholic commentator Gloria Purvis weighed in on why she thinks cardinals ultimately chose Chicago’s Robert Prevost — who is now Pope Leo XIV.

Newly elected Pope Leo XIV’s brother, John Prevost, spoke to ABC News about the pride he has in his brother becoming the first American pope.

American Cardinal Robert Prevost has been elected the 267th pontiff. He has chosen the name Leo XIV, a senior cardinal deacon announced.