The statue of Blessed Carlo Acutis was commissioned to celebrate the 150th anniversary of the Irish cathedral.
Carlo was born on May 3 1991 and died on October 12 2006 aged just 15 after suffering from leukemia.
The London-born young Italian was an amateur website designer with a deep faith, especially in the Eucharist and the Rosary.
Carlo was beatified on October 10, 2020 and the statue was unveiled at a special Mass at St Eugene’s Cathedral on Wednesday.
A spokesperson for the Diocese said: “Carlo is a powerful example of faith for young people. Having his statue in the Cathedral encourages young people to come to the Cathedral to pray and it makes the Cathedral a place to pray for young people.
"The statue was carved in Italy in the factory of Ferdinard Stuflesser. Carlo’s mother Antonia has gifted the Cathedral will a lock of his hair which will be beside the statue in a reliquary."
Bishop Donal McKeown blessed the statue of Carlo at 10.00am Mass on his birthday, May 3.
The London-born young Italian was an amateur website designer with a deep faith, especially in the Eucharist and the Rosary.