Carlo Acutis, a London-born boy, has been canonized as the first millennial saint by Pope Leo. Known for documenting miracles online, he gained the nickname 'God's influencer.' His canonization was delayed due to Pope Francis's death. Many have visited Assisi, where his body is preserved, and Our Lady of Dolours Church in London, where he was baptized. Carlo, who died of leukemia at 15, is remembered for his love of technology and video games. His mother advocated for his sainthood, and two miracles were attributed to him. The Vatican's fast-tracking of his canonization aims to inspire young people.