In an exclusive interview with the NBC Chicago, Pope Leo XIV’s brother shared an update on how his sibling is navigating his massive new role as he marks 100 days as the first American pope.

In his first three months as pope, a Gallup poll showed Leo is the most popular world leader, with a 57% favorable rating.

His brother, John Prevost, said Leo “seems to be perfectly at ease” in his new role.

“He seems to be enjoying it. It’s like this is a natural,” Prevost said.

Now, thousands want to see Pope Leo, affectionately known as “Da Pope” in Chicago. They want to touch him, receive his blessing. The enthusiasm is palpable.

This summer, it’s estimated one million young people attended the Jubilee for Youth in Rome.

Flores, an Augustinian, the same religious order as the Pope, hosted Leo at St. Jude’s when he was still Cardinal Prevost one year ago.

“We’re just so thrilled he was elected,” he told NBC Chicago. “That he’s our Augustinian brother, that we know him so well, that we’re connected to John, it’s incredible.”

Pope Leo told Chicago’s Cardinal Blasé Cupich he was grateful for the Chicago support when a huge crowd gathered in June at Guaranteed Rate Field, the home of the Pope’s favorite team, the White Sox.

What might his parents think – if they were still alive?

“I don’t know that they’d go around bragging – cause they weren’t bragging people,” Prevost said. “I don’t think you’d see my mom say, ‘Well, my son’s the Pope.’ I don’t think that would happen.”

Prevost, just one year older than Leo, is the middle of the Prevost sons. Their brother Louis is the oldest

“I say all the time, the oldest is the experiment, the youngest gets spoiled and the middle comes out right,” Prevost said.

Prevost, a retired Catholic school principal, has no doubt about  the future of the Catholic church.

“Oh, I definitely think the church is in good hands. What people don’t know is, he’s taking this very seriously,” Prevost said of his brother. “It might not look, you see him enjoying himself, but this is quite a burden on his shoulders and he’s praying for the world.”

And, when his brother was elevated to become a cardinal less than two years ago, Prevost said it was just another sign.

“Why was my brother named first? What was the Pope saying by calling him up first? It wasn’t alphabetically.   He was close close with Francis,” Prevost said. “He was. They were very good friends.”

Prevost and Father Ray Flores from St. Jude’s parish in New Lenox both immediately went to Rome when Leo was chosen.

Even though it seemed Leo was a long shot before his election, Prevost said there were signs he might be the one.

“Pope Francis gave him another title just before his death – Cardinal Bishop, he’s signaling something there,” Prevost said.