Gigi Hadid and Zayn Malik are expecting first child, according to reports

The model and former One Direction band member have been in an on/off relationship since 2015

The most recent picture of the couple together: Gigi Hadid with Zayn Malik and sister Bella Hadid, celebrating Gigi's 25th birthday on April 23, 2020. Instagram / Gigi Hadid

Zayn Malik and Gigi Hadid seen on January 12, 2018 in New York City. Getty Images

Gigi Hadid and Zayn Malik celebrating his 25th birthday in January 2018. Instagram / Gigi Hadid

Zayn Malik spending Christmas with Gigi Hadid's family, in a post shared by the model's mother Yolanda Hadid in December 2017. Instagram / Yolanda Hadid

The couple graced the cover of Vogue's August 2017 issue. Instagram / Gigi Hadid

Zayn Malik and Gigi Hadid attend the Givenchy show as part of the Paris Fashion Week Womenswear Spring / Summer 2017 on October 2, 2016 in Paris, France. Getty Images

Gigi Hadid and Zayn Malik attend the Versus Versace show during London Fashion Week Spring / Summer 2017 on September 17, 2016 in London, United Kingdom. Getty Images

Gigi Hadid and Zayn Malik arrive for the "Manus x Machina: Fashion In An Age Of Technology" Costume Institute Gala at Metropolitan Museum of Art on May 2, 2016 in New York City. WireImage

Zayn Malik and Gigi Hadid leaving their East Village apartment on March 25, 2016 in New York City. Getty Images

Zayn Malik, Gigi Hadid and Taylor Swift leave Gigi Hadid's apartment on September 12, 2016 in New York City. Getty Images

Gigi Hadid is pregnant. Several reports say the American-Palestinian model is expecting a baby with her British-Pakistani singer boyfriend, Zayn Malik.

The model is yet to confirm the news, however she did post videos from her 25th birthday on Thursday, April 23, which eagle-eyed fans suggest show the early promise of a baby bump.

"Gigi and Zayn are expecting their first child together and the couple is very excited. Gigi has kept the secret close to her family and friends for a while as she's only a few months along," a family source told Entertainment Tonight. 

Hadid and Malik have been in an on/off relationship since 2015, but broke up for a period in 2018. It was confirmed they were back together in December 2019.

"Once Gigi and Zayn got back together at the end of last year, it was like they never skipped a beat and knew what they had was special," the source said. "The couple and their families are overjoyed."

The model has spoken about wanting to start a family in the past.

In February, she told i-D magazine: "As I get older ... well one day, I'll start a family and I don't know if I will always be modelling.

"The people I work with make me so happy, I’m so lucky to be around them. But who knows? Maybe I’ll take up full time cooking."

The Hadid and Malik families are yet to confirm the news, but fellow celebrities have rushed to congratulate them on social media.

"It is a big day for Gigis," Chrissy Teigen wrote on Twitter, referring to Hadid and Golnesa 'GG' Gharachedaghi, 38, the star of reality TV show, Shahs of Sunset, who gave birth to her first child on Monday, April 27.