He's been missing since Monday.
Gardaí are seeking the public's assistance in finding a missing midlands teenager.
17-year-old Jack O'Donoghue was last seen in Portlaoise, on Monday.
He's described as being approximately 5 foot 5 inches in height with a slight build, brown hair and grey eyes.
When Jack was last seen he was wearing a grey jacket with a grey tracksuit and black shoes.
He's known to frequent Dublin city centre.
Anyone with any information on Jack's whereabouts is asked to contact Portlaoise Garda station on 057 867 4100, the Garda Confidential Line on 1800 666 111, or any Garda station.