'Game of Thrones' actor Michael Patrick dead at 35

"He was able to make an audience laugh or cry in an instant," Kearney said. "As a writer, he could express the knife-edge of comedy and tragedy that is human experience. He was a firm believer that a play should never bore and always entertain. Michael dealt with his diagnosis with bravery and humility, showed us how we can do better when it comes to disabilities, and he could always make you smile. I am so proud to call him my creative partner and even prouder to say he was my friend. He will go down as one of Ireland's greats."

"He was admitted 10 days ago and was cared for by the incredible team there," she wrote. "He passed peacefully surrounded by family and friends. Words can't describe how broken-hearted we are."

"It's been said more than once that Mick was an inspiration to everyone who was privileged enough to come into contact with him, not just in the past few years during his illness but in every day of his life," she continued. "He lived a life as full as any human can live. Joy, abundance of spirit, infectious laughter."

She went on to call Patrick "a titan of a ginger haired man," and expressed her gratitude to "every person who supported us through the last few years."

"Mick loved this quote from Brendan Behan and this feels appropriate now: 'The most important things to do in the world are to get something to eat, something to drink and somebody to love you,'" she said. "So, don't overthink it. Eat. Drink. Love."

When diagnosed with the disease, the "motor neurons gradually become damaged over time, leading to disability and eventually death." There is currently no cure.