The Irish actor Karl Shiels has died suddenly.
The 47-year-old was best known for playing Robbie Quinn in Fair City.
The news was confirmed by talent agency Lisa Richards.
— Lisa Richards (@LisaRichardsLtd) July 15, 2019
In a statement, the agency said: "We are deeply shocked and saddened to learn of the sudden passing of our client and friend Karl Shiels yesterday.
"Karl was uniquely talented individual, simultaneously intense, lighthearted, funny, sharp witted, outspoken and intensely powerful as an actor, director and artistic director."
It adds: "Karl was also our friend, the loving father to his two girls, a man loved by so many who knew him and worked with him and he will be deeply mourned by all who did."
Karl's co-star, Eric Lalor, has described him as a "hugely gifted actor and a really great friend".
Dave Kelly, another Fair City star, said he was "heartbroken" at the news.
Heartbroken at the news. I'll miss you trying to make me laugh before a take. You brought great talent and life to the set everyday. For all them little bits of wisdom you shared, thank you. Be good Robbie ❤️ @KarlShiels #karlshiels
— Dave Kelly (@DavekellyDave) July 15, 2019
As well as his major role in Fair City, Shiels featured in a number films and TV shows - including Batman Begins, Peaky Blinders and Veronica Guerin.
He also served as the artistic director of the Theatre Upstairs, an independent theatre in Dublin city centre.
Project Arts Centre, also based in Temple Bar, paid tribute to "a formidable force" in Irish theatre:
We’re deeply saddened to hear of the sudden death of our friend and colleague Karl Shiels. Irish theatre has lost a formidable force today. Karl was not only an immense talent but a passionate champion & mentor to many theatre makers. Our thoughts are with his family and friends.
— Project Arts Centre (@projectarts) July 15, 2019
