Missing Daniel McAnaspie, who vanished eight weeks ago and is believed to have been murdered, had planned to meet a girl on the night he disappeared, his family have said.
The 17-year-old from Finglas had gone to the Whitestown area of Blanchardstown with a pal to meet two girls, but Daniel has not been seen since.
His distraught family have vowed to continue searching for him until he is found.
Speaking as Crimestoppers launched a €10,000 reward for information that will lead to the whereabouts of Daniel, his heartbroken sisters and aunts have said they fear the worst has happened to their happy-go-lucky brother and nephew.
These latest pictures show Daniel as a young boy growing up in the large family that is now heartbroken at his disappearance.
"He was a jolly lad, and loved playing football -- just like any fella his age," said his aunt Sabrina.
"He would see the good in people, and now we are fearing the worst."
Daniel was last seen between 3.30am and 4am on Friday February 26 in the Whitestown area of Blanchardstown. He was in the company of a group of people aged between 16 and 22.
"We want people to know that we will not stop searching for Daniel," explained another of Daniel's aunts, Margaret.
Daniel is 5ft 7ins tall, of slim build with brown hair.
When last seen he was wearing a navy jacket with a hoody, navy three-stripe Adidas tracksuit bottoms and white runners.
Crimestoppers can be contacted on 1800 250025.