On Sept. 13, Katy took to Instagram to reveal that Taylor sent a hand-embroidered blanket to 3-week-old Daisy Dove.
"Miss [Daisy Dove] adores her hand embroidered blankie from miss @taylorswift," Katy captioned a snap of the pink blanket. "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 bears the words "Baby Bloom" in the right corner above a hand-stitched flower.
Taylor also wrote a note on her personalized letterhead to the new parents. The envelope reads, "Katy and Orlando (and little one)."
Katy returned the favor by giving Taylor's new album, "Folklore," a subtle plug in her Instagram post: She tagged her location as "Stream Folklore."
The two women have come a long way. For years, they had an ongoing feud that began in 2014 as a squabble over backup dancers.
"She started it, and it's time for her to finish it," Katy told James Corden in 2017. "I tried to talk to her about it and she wouldn't speak to me."
Katy later said she would like the feud to end, noting, "Women together will heal the world."
Then, in 2018, Taylor and Katy got past their differences and slowly began building a friendship. Finally, last summer, the women proved they had come full circle when Katy appeared in Taylor's "You Need to Calm Down" music video.
"She sent me a really nice note and an olive branch to my tour when it started a while ago," Taylor told Capital FM after the video was released. "From that point on, we've been on good terms. Then we saw each other at a party and walked up to each other and hugged it out and talked about things."
Taylor said she felt "lighter" after making up and added, "We'd grown past allowing ourselves to be pitted against each other."