A source close to the couple told TMZ, "Gigi is 20 weeks along, and both their families are happy."
Another source confirmed to Entertainment Tonight, "Gigi has kept the secret close to her family and friends for a while, as she's only a few months along."
As fo writing, Gigi and Zayn have not announced the news official.
The former Victoria's Secret model has reportedly been staying at her family's farmhouse in Pennsylvania with Zayn during the coronavirus lockdown.
Just last week, Gigi Hadid celebrated her 25th birthdayparty and posted photos of the celebration on her Instagram.
The 25-year-old and her 27-year-old boyfriend were first seen out as a couple in November 2015. They have reportedly broken up in June 2016 but got back together later.
In March 2018, they once again called it quits, and then rekindled their relationship once again. But by January 2019, Gigi and Zayn split again before reuniting in December 2019.
Since the couple got back together officially in December, the source said that "they never skipped a beat and knew that what they had was special."
The pair first started dating after meeting at a Victoria's Secret party.
It was reported that the shy boy plucked up the courage to approach the stunning Gigi, having recognized her from photographs and then bravely asked her out.
In case you want to relive Gigi and Zayn's on-again, off-again romance, let's revisit their relationship just before they become parents.