A London-born boy has become the first millennial saint, celebrated in a ceremony led by Pope Leo on Sunday. In his short life, Carlo Acutis created websites documenting 'miracles' to spread Catholic teaching, leading some to call him 'God's influencer.'

His canonization, initially scheduled for late April, was postponed due to the death of Pope Francis. An estimated million pilgrims visited Assisi, Italy, where Carlo's body is preserved in wax.

Since his beatification announcement, the Our Lady of Dolours Church in London has seen a surge in visitors, marking the site of Carlo's baptism in 1991. The church features a shrine with a relic from Carlo, including a strand of his hair.

Carlo Acutis moved back to Italy as a child and became known for his love of technology and video games. He may have appeared less devout but, at a young age, documented miracles online, which are now framed at the Chelsea church.

Sadly, he passed away from leukemia at just 15. His mother, Antonia Salzano, traveled worldwide to advocate for his sainthood, ultimately proving two miracles attributed to him. One of these miracles, occurring the day of his funeral, involved a woman experiencing a cancer cure after praying to Carlo.

Pope Francis attributed two miracles to Carlo, facilitating his canonization amidst a time of mourning for the Vatican after the pope's death. The significance of Carlo Acutis resonates deeply with young Catholics who find a relatable figure in his interests and lifestyle.

Approval for canonization can take years, but Carlo's quick path reflects an effort by the Church to connect with and inspire the youth of today.