The couple announced the news with an adorable black-and-white shot on Instagram, saying in the caption that they were "floating with love and wonder from the safe and healthy arrival of our daughter".
Of course, Katy was flooded with congratulations on the new arrival from fans and fellow celebs alike, with Beyoncé sending her a huge bouquet of flowers to celebrate.
And on Sunday, Katy posted on Instagram revealing baby Daisy Dove's latest gift — a hand-embroidered silk blanket from none other than Taylor Swift.
"Miss 🌼🕊 adores her hand embroidered blankie from Miss Taylor Swift," Katy wrote in the caption. "Hope it’s one she drags around for years till it becomes an unrecognizable shred that she keeps in her pocket as a teenager."
The blanket's corners are embroidered with yellow stars and the year of Daisy Dove's birth.
And Katy also posted a close-up shot of the adorable embroidered flower and the name "Baby Bloom".
Of course, it wouldn't be a gift from Taylor Swift without a handwritten note — and based on what we can see, it seems to have been inspired by Taylor's own treasured blanket when she was a baby.