They pair welcomed a baby boy into the world - over a week ago - and they've managed to keep things under wraps until the obligatory twitter announcement.
The 36-year-old television presenter - who married Chris O'Dowd in 2012 and announced their baby news via the never ending slew of Ice Bucket Challenges that was August - gave birth to the couple's first child last Sunday (25.01.15). They have called him Art.
— chris o'dowd (@BigBoyler) February 1, 2015
The How To Look Good Naked co-presenter also confirmed the news on her account where she described the first seven days spent with the baby as 'beautiful'.
Thanks all. He is one week old today. It's been a beautiful week. I think we'll definitely keep him;)
— Dawn O'Porter (@hotpatooties) February 1, 2015
The Bridesmaids star met Dawn through mutual friends at her 30th birthday party and wed the brunette in a low-key ceremony in June 2012, when she decided to change her surname, Porter, to O'Porter, to acknowledge their nuptials formally. I dunno, Art O'Dowd has a better ring to it than Art O'Porter. Bit of a mouthful...
Dawn previously revealed she would be giving birth to their first child in Los Angeles because it is where they currently live, despite neither of them being from America.
She said: "We're having our baby in America definitely, but I don't know where we're going to be living in five years. It's nice that we travel all the time and we love living in LA. That's totally home. But London or Ireland is also another opportunity."