Credit: Getty Images

Colin O'Donoghue is officially a dad!

The Once Upon a Time actor tweeted the happy (and unexpected!) news Monday morning, writing "I'd like to welcome my beautiful baby boy, Evan into the world!! Born early Thursday morning. So proud to be a father!!" 

Colin has kept his private life, well, relatively private, but he's opened up about his wife Helen before. Last year, the Irish actor told Access Hollywood his wife likes to have fun with his newfound "Hooker" status. “My family was sort of — [they] take the mick out of me and think it’s funny, and so does my wife,” Colin told Access. “She's like, 'Have you seen what they’ve said, here, about this, or that and the other,' and I was like, 'No.' I just say, 'Don’t look at it.'" 

Aw, we're glad Helen can have a bit of fun at Colin's expense. 

Here's hoping Colin tweets an adorable father-son selfie next! Remember Colin, pics or it didn't happen! 

Are you happy for Colin and his wife Helen? Sound off in the comments below!