The supermodel, 25, and former One Direction member, 27, have welcomed their first child together, a baby girl, Malik announced Wednesday.

"Our baby girl is here, healthy & beautiful," Malik wrote on Twitter.

"To try put into words how i am feeling right now would be an impossible task," the new dad continued. "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 x."

Later on Wednesday evening, Hadid also shared the couple's big news confirming their little girl had arrived over the weekend.

The model shared another black and white image featuring Malik and their daughter holding hands.

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

Hadid confirmed she was expecting with Malik during an April 30 interview with Jimmy Fallon, telling The Tonight Show host, "Obviously, we wish they could've announced it on our own terms, but we're very excited and happy and grateful for everyone's well-wishes and support."

Sources close to the couple told PEOPLE in May that the dating couple were "thrilled" about the baby and their next chapter together.

"They've been through their ups and downs, but neither stopped caring about the other," a fashion-world source said. "They've jumped on the timing of having a baby and are preparing for their new lives."