Mr O’Callaghan and Ms Delaney, a Mum-of-two took to social media to reveal they tied the knot on Thursday at a registry office.
The father-of-three left his role in Classic Hits FM on September 1st, 2018 after receiving a diagnosis of Multiple System Atrophy (MSA), a neurodegenerative illness.
The progressive disease results in a loss of function and death of different types of nerve cells in the brain and spinal cord. Around 3,000 people in Ireland and the UK have been diagnosed with it.
The former broadcaster came to national prominence when he worked on RTÉ’s 2FM 40 years ago.
I married this beautiful woman @PaulaDelaney53 this afternoon. I feel blessed pic.twitter.com/yfsElIfQIM
— Gareth O'Callaghan (@GarethOCal) September 17, 2020
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The couple who now live in Cork revealed last week that their wedding plans were in train but did not reveal the date.
On his official Facebook page, the 59-year-old said: “I married this beautiful woman today. I feel blessed that I met her five years ago. Thank you.”
Thousands of people congratulated the couple with one well wisher saying, “Fantastic that you both met and have enhanced each others lives. Congratulations and wishing you health, laughter and happiness. Miss your dulcet tones so much.”
Another member of the public added:”Gareth my very best wishes to you and your lovely bride. When you meet someone who is a secure base and loves you for who you are in sickness and in health then you know that you have struck gold. Sir you have both just won the lottery.”
Ms Delaney told her Twitter followers, “(This is) the best day of my life”. Broadcaster Miriam O’Callaghan congratulated the couple adding, “Congrats to you both. Wonderful news.”
Long time colleague of O’Callaghan Bibi Baskin tweeted:”How marvellous. A picture of love too. Congratulations,” while cancer care advocate Vicky Phelan also added her best wishes, “Beautiful photo Paula. Enjoy the celebrations.”
In an interview following his diagnosis Gareth said his life in radio had been "a dream job."
Happiest day of my life .. #married ❤️ @GarethOCal pic.twitter.com/18e5QBGJar
— Paula O’Callaghan (@PaulaOCal) September 17, 2020
However, he admitted that radio work is stressful and any type of pressure "is like red meat to a shark to MSA.” Initially symptoms of MSA resemble Parkinson’s.
“Sadly this illness continues to progress. I thought initially that I could slow it down by trying out different therapies and activities. While they have helped, it continues to wear me down little by little, bit by bit.
“But I'm putting up the best fight I can every day”.