Family and friends of Daniel McAnaspie will say a final farewell to the murdered teenager.
The 17-year-old, who was in HSE care, vanished after socialising with a group of people in Blanchardstown, west Dublin, in February.
His distraught family made several tearful appeals for information while specialist search teams combed nearby farmland and parks, with the Garda helicopter and sniffer dog units assisting the investigation.
Almost three months after he went missing, the teenager's body was found dumped in a ditch on farm land in Co Meath last month.
He had been stabbed to death.
Daniel's siblings have criticised the care given to Daniel by the state after their parents died, leaving six youngsters behind.
His funeral will be held at the Church of the Annunciation in Finglas before he is laid to rest in Glasnevin Cemetery.