Alan O'Neill who appeared on the US programme Sons of Anarchy has reportedly past away.
The 47-year-old starred as Hugh in the hit US crime drama.
The actor is also known for his roles in Irish soap Fair City and a number of films.
O'Neill's manager Greg Meyer confirmed the tragic loss of the actor to Variety.
Tributes have flooded in on Twitter from his fellow co-workers and friends.
In a tweet, co-star Timothy V Murphy said:
"My good friend Alan O’Neill died today....we worked together on The Sons Of Anarchy...my condolences to his family."
Actor Stephen O'Halloran posted a picture of them together, along with "RIP Alan, sleep tight."
Devestated to hear that my pal and former @RTEFairCity and @SonsofAnarchy actor Alan O Neill has passed away at 47. This was photo was his last visit home a few months back. RIP Alan , sleep tight pic.twitter.com/APa13x4KaE
— Stephen O’Halloran (@stefohalloran) June 7, 2018
Actress Jenny Dixon thanked the late actor for his "kindness" and said she was privileged to have crossed his path.
One of the first films I did & a privilege to act across from @AlanONeill19 .A great friend who taught me so much. Thank you for your kindness. So very sorry to hear of your passing. A great man, sadly missed. My thoughts & prayers to you & to your family pic.twitter.com/Kygj7pybWo
— Jenny Dixon (@JennyleeDixon) June 7, 2018
In the 1990s, O'Neill hit our television screens in a number of small appearances, but his big break came on Fair City in 2006.
The 47-year-old starred in the sixth and final seventh season of Sons of Anarchy.
His latest role was in the 2016 film Urge, as the Captain.
O'Neill was reportedly uncovered on Wednesday night, at an apartment in Los Angeles.
Foul play has been ruled out in his death.
