Halsey and her screenwriter beau are set to pen a new chapter.
The American singer, born Ashley Nicolette Frangipane, has announced she is pregnant with her first child with partner, Alev Aydin.
"Surprise," the Without Me star captioned a series of photographs on her Instagram account on Wednesday, as she bared her growing bump.
Halsey, 26, did not confirm her due date or give any other details about her pregnancy, bar tagging Aydin in the images.
"Heart so full, I love you, sweetness," replied the screenwriter in the comments, to which the singer added: "I love you! And I love this mini human already!"
The couple had mostly kept their romance private, with Halsey's pregnancy announcement also serving as the first confirmation of her relationship.
Who is Alev Aydin?
It is not known exactly where the screenwriter, 37, was born, but he has previously shared details about his Turkish roots on social media.
He has posted many images taken in Istanbul over the years, referring to the country as "the motherland" and "the homeland".
Halsey has even posted messages to Aydin in Turkish.
"Grateful for you this year and every year, sweets. Seni cok seviyorum," she captioned a photo of the pair shared on New Year's Eve. The Turkish phrase translates to "I love you so much".
Aydin has a number of credits to his name on industry database IMDb, most notably as the creator and executive producer of Small Shots, a 2017 mini-series about two actors trying to break into Hollywood, which is available on Netflix US.
He is also credited as the writer, director and producer of HipMen: Los Angeles, a 2017 short film about "a team of stylish hitmen who are hired to kill a big-shot music producer".
His most recent listed work is as an actor in 2018 thriller Cruel Hearts.
He also made several appearances on popular soap opera General Hospital between 2008 and 2010.
How long have Aydin and Halsey been together?
Though the pair have kept their relationship under wraps, a source told People they "have been dating for several months".
"Halsey has been low-key about their relationship. They were spending a lot of time at her house in the fall though, and it was obvious that she was happy," the source told the publication.
They were, however, first pictured together in 2019, attending a Lakers basketball game.
Aydin shared a photo of the pair sat courtside in a throwback post in March 2019; the game took place that January.
"Back when I did a very cool thing I’ll prob never get to do again – massive thanks @iamhalsey for the courtside experience. Only ones not on our phones, actually watching the game," he captioned the image.
The pair also hinted at their relationship in June 2020, after celebrity tattooist Amanda Owley shared a picture of them getting a matching design in Los Angeles.
Aydin got the word "seeds" inked on the top of his foot, while Halsey had the same word etched near her heel.
Halsey had previously been linked to actor Evan Peters and rapper G-Eazy.
She revealed she had suffered a miscarriage in 2018, telling The Guardian in 2020: "It was the most inadequate I've ever felt. Here I am achieving this out-of-control life, and I can't do the one thing I'm biologically put on this Earth to do."