But since then, we've heard nothing further about the twins or life at the Carter household now that it's a family of five.
Thankfully, Beyonce's mum, Tina Knowles, isn't quite as tight-lipped as her daughter, revealing in a new interview that the little ones are "doing great."
"They are absolutely beautiful and so much fun," the doting grandmother told Entertainment Tonight.
"I mean, I haven't ever been around twins, but it's so cute, I can hardly take it."
"It's crazy ... it's just really, really different with two babies. I mean, a boy and a girl," she continued. "They have very different personalities."
On how Blue Ivy is settling into the role of big sister, Beyonce's stepfather, Richard, says: "It's making her grow up, it's bringing some maturity."
"She's only five, but you can see the transition in terms of her being a little more calm."