Mark Feehily has announced he’s going to be a dad.

The Westlife singer marked his 39th birthday by taking to social media to reveal that he and his fiancé Cailean O’Neill, who have been together for five years, are to become dads for the first time.

Sharing a mirror selfie of himself alongside his husband-to-be and a scan of the baby on his phone, Mark thanked his fans for the birthday messages and said the exciting news was the “proudest moment” of his life.

“Thanks for all the Birthday wishes everyone! It makes this my most special birthday EVER to let everyone know that later this year we will become Dads for the first time,” he wrote on Twitter.

“This is the proudest moment of our lives and we are beyond excited to say it out loud!”

Mark and Cailean revealed that they were engaged in February, and are reportedly planing to get married this summer.

“I would love to have my own kids running around one day,” he recently told the Mail on Sunday. “Listen, that is absolutely a dream for me when it happens. I say when it happens because it will happen.

“It is absolutely the next step. Everything is exciting. Sometimes your work is amazing but your personal life is in trouble. Sometimes the personal life is great but you have no work.

“When the two come together it is the perfect harmony and that is where I am at and hopefully it will stay like that.”