Ronan Keating's son Jack once "woke up the whole house" when he brought a girl home before entering Love Island.
The Casa Amor bombshell, who recently welcomed a baby girl, was briefly in the dating competition last summer.
Although he didn't have much luck in the villa, his love life is a lot different in the outside world.
Singer Ronan once exposed his son's sex secrets during his appearance on his Magic Breakfast radio show.
At the time, Ronan revealed he heard "screaming" and had to text his son to ask his guest to quieten down.
Speaking about the embarrassment, Jack said last year: "That’s the one thing I can't live down."
He added: "That happened way before Love Island, when I first moved in with them, I brought a girl home and ended up waking up the whole house.
"I haven’t seen her since and don’t think I will, she was snuck out the bedroom door ASAP and breakfast was very awkward."
Jack took to his Instagram page on Thursday night to share the news he welcomed a baby daughter.
Boyzone star Ronan, 46, gushed over his "cutie" granddaughter in a sweet post on social media.
Jack shared a black and white photo of himself with his baby daughter in his arms.
He didn't share the name of the newborn in the post.
The 2022 islander captioned the image: "Welcome to the world my little [princess emoji]".
The heartwarming post was flooded with likes and comments, with Ronan also joining in.
The Irish singer wrote: "Little cutie [heart emoji]".
Jack's mum Yvonne Connolly, 49, also commented about being a grandmother. She said: "I miss her so much already [pink heart emojis]".
After hearing the news, fans rushed to the comment section to share their confusion about the timing of the birth.
Jack appeared on Casa Amor in July of last year, leaving fans wondering whether his baby was conceived before he entered the show.
One user commented on his post: "I know I’m bad at maths, but the math ain’t mathing on this at all!!! Love Island isn’t even 9 months ago yet. I mean I know accidents happen but…."
"I’m so confused. The maths isn’t adding up," one puzzled user said while another added: "Woah have I missed something."
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