Gigi Hadid & Zayn Welcome Their First Baby Together

"To try put into words how I am feeling right now would be an impossible task. The love I feel for this tiny human is beyond my understanding. Grateful to know her, proud to call her mine, & thankful for the life we will have together."

Gigi also wrote, "Our girl joined us earth-side this weekend and she’s already changed our world. So in love."

On Tuesday (Sept. 15), Hadid's younger sister and fellow model Bella posted an older photo of them showing off their "buns in the oven," which the younger Hadid clarified, "only except mine is from my burger and gigi’s is from @zayn. i love you both so freaking much -can’tstopcrying."

The two have been quarantining with her parents and younger sister on the Hadid family's farm outside of New Hope, Penn.

After TMZ initially reported Hadid's pregnancy, the 25-year-old model confirmed the happy news to Jimmy Fallon on The Tonight Show on April 30. "Obviously, we wish we could have announced it on our own terms," she told Fallon at the time. "We're very excited and happy and grateful for everyone's well wishes and support."

She and the former One Directioner have been romantically linked since 2015. A year after they first started dating, Hadid starred in the 2016 music video for his Hot 100 No. 1 hit "Pillowtalk."

Zayn is the third member of One Direction to become a father, following Louis Tomlinson and Liam Payne.