Gigi Hadid and Zayn Malik's Relationship Timeline

The two first sparked relationship rumors when they were spotted at The Nice Guy in Los Angeles on Nov. 22, following the American Music Awards. Hadid was a presenter at the event, and Malik's former One Direction bandmates walked away with several of the night's top honors. The singer and the recent Victoria's Secret runway model were spotted there again days later, adding fuel to the speculation that they were dating. On Nov. 30, they officially became an item when they were photographed holding hands while leaving the same restaurant.

The sightings came after Hadid split from singer Joe Jonas earlier in the month after a summer romance, while Malik called off his two-year engagement to Little Mix singer Perrie Edwards that August.

Fans got a look at their insane chemistry when Hadid starred in Malik's music video for his debut single, "Pillowtalk." They then engaged in a flirty back-and-forth on Twitter that fans couldn't help but notice.

During an interview with Zach Sang & the Gang, the former One Direction member seemingly confirmed that Hadid was his girlfriend. Asked if it was cool to have his girlfriend in the video, Zayn replied, "Uh, yeah that was cool. That was something different and, yeah, we enjoyed it. That was fun, we had a lot of fun on set."

The couple -- dubbed Zigi -- posed together in Naples, Italy, for a glamorous photo shoot by famed photographer Mario Testino for the May issue of Vogue.

The two made their red carpet debut as a couple at the Met Gala. That year's theme was "Manus x Machina: Fashion in an Age of Technology."

Malik and Hadid only had eyes for each other when they attended the Versus Versace show during London Fashion Week.

Just one month later, all eyes were on the It Couple as the continued their fashion dominance at the Givenchy show during Paris Fashion Week.

ET caught up with the 21-year-old model as prepared to host next the 2016 American Music Awards, where her boyfriend had been nominated for New Artist of the Year. She dished on their one-year relationship, saying, "We were both talking about [the fact that] we'd never actually been on a first date until each other. I met him once before and he is obviously so gorgeous, but really the way we could have conversations and kind of just…we're really interested in the same things, so it was really easy. So that was amazing."

The couple had a matching moment in oversized Tommy Hilfiger sweatshirts as they exited a Paris hotel. Hadid frequently walks in the designer's shows and has collaborated with him on collections.

The duo landed their own Vogue cover, posing for the August issue of the fashion publication. Inside their feature, Hadid shared the most romantic thing her boyfriend had done for her, saying at the time, "A couple of years ago on Valentine's Day, we went on a boat trip, and that was really nice."

The pair celebrated their two-year anniversary on Nov. 12, with Hadid sharing a snap of the two smooching on her Instagram Stories. "Two years with my favorite human," the model wrote on her Boomerang.

Two months before their first breakup, Hadid shared a sweet Instagram message for her beau's 25th birthday. "Love this man more than I could ever put into words, & am inspired by his drive to be and do better everyday ✨ cheers to YOUR YEAR my @zayn - happiest happiest birthday & 25th year of life !! I’m proud to be by your side x," she wrote.

Hadid and Malik split for the first time after more than two years of dating. Malik confirmed the news via Twitter, sharing a note that was seemingly written using the Notes app on his iPhone. "Gigi and I had an incredibly meaningful, loving and fun relationship, and I have a huge amount of respect and adoration for Gigi as a woman and friend," the "Pillowtalk" singer shared. "She has such an incredible soul. I'm grateful to all of our fans for respecting this difficult decision and our privacy at this time. We wish this news could have come from us first. We love you all."

Hadid shared her own statement, echoing the singer's amicable words. "Breakup statements often seem impersonal because there is really no way to put into words what two people experience together over a few years," she explained. "Not only in the relationship, but in life in general. I'm forever grateful for the love, time and life lessons that Z and I shared. I want nothing but the best for him and will continue to support him as a friend that I have immense respect and love for. As for the future, whatever's meant to be, will always be."

Just one month after publicly announcing their breakup, the two were spotted kissing in New York City. In photos obtained by DailyMail.com, the two were seen passionately smooching while walking around Manhattan. Though Malik was not spotted at Hadid's celeb-filled birthday celebrations that same month, there had been rumors swirling that the pair was back together, as the former One Direction member reportedly gave her red roses on her birthday and was spotted leaving her Big Apple apartment a couple of times, including on April 24, the day after the model turned 23.

Malik told GQ that he and Hadid are "adults" and, at the time he spoke with the publication, they didn't feel the "need to put a label on it, make it something for people's expectations." The British singer also noted that his ladylove helped ground him after he released his first solo album, saying, "I had a very negative outlook on things. That might have been adolescence or testosterone or whatever the f**k was running through my body at the time. She's helped me to look at things from a positive angle."

Hadid clapped back at an account that claimed her relationship with the singer was fake. "Seems like u guys tag me in a new post every day… pls stop.. it’s just negative, I really have no hard feelings towards you I just know what a beautiful world there is to go out and live in instead of trying to dissect a relationship between two people that you don’t even know and that you do not see 99% of,” Gigi wrote in part on a post that called out the fact that Malik didn't follow her on Instagram. “For someone who is virtually inactive on the app, I don’t need his follow- my eyes are tattooed to his chest.”

The two spend the Muslim holiday of Eid together, where Hadid enjoyed quality time with Malik's family.

Hadid's last Instagram post with Malik before their second split came on Oct. 21, though it's since been deleted. "Flyin home to my happy place," she wrote alongside a picture of the two cuddling. And as for Halloween photos, the blonde beauty was flying solo in those.

Zigi splits for a second time. After fans began to speculate that they were no longer together, amid their lack of social media and outings, a source told ET on Jan. 3 that the two had indeed broken up. "Gigi and Zayn have broken up, but not because they don’t love one another," the source said at the time. "After trying for a long time, the couple just couldn’t make it work. Zayn has been dealing with personal things for a while and Gigi has become a comfort blanket for him. Gigi will always support him but she has realized only Zayn can help Zayn." However, a couple of weeks later, the model was spotted leaving her ex's New York City apartment.

Fans began thinking the pair was back together when Malik tweeted, "@GiGiHadid love you," on March 2. Hadid never replied back.

The "I Don't Wanna Live Forever" singer quickly shot back at haters, telling critics to leave his ex-girlfriend "the f**k alone," after they assumed some of his previous tweets were about her. "My tweet was not about @GigiHadid so leave her the f**k alone," the former One Directioner tweeted on April 4. "She is the most amazing woman I've ever known. And does nothing but love and support me when lord knows I don’t deserve it."

Hadid began a two-month fling with former The Bachelorette contestant Tyler Cameron. Though they were spotted a number of times together and even packed on the PDA at a VMAs after-party, the two were dunzo by October.

The former couple began to "talk," but not because they were hoping to rekindle their romance, a source told ET. "The two have continued to talk and support one another since their breakup, but they're not dating or talking like that anymore, just friends," the source said. "Zayn and Gigi have a special relationship, respect one another and want what’s best for one another. They don’t know what the future holds, but for now it’s not them as a couple."

The two looked pretty cozy as they were photographed strolling arm-in-arm on the way back to Hadid's New York City apartment on Jan. 11, a year after their last split.

The blonde beauty confirmed that she and Malik were back together when she wrote about her "valentine." The model shared a picture of Malik, captioning it, "HEY VALENTINE. Z on the farm ♡ Dec 2019."

Hadid had Malik right by her side for her 25th birthday on April 23. The birthday girl shared a sweet boomerang of her birthday celebration with sister Bella Hadid and her boyfriend. The post showed Malik sandwiched between the sisters in an embrace, with Hadid proudly holding up balloons for her special day. 

Just a couple of days later on April 28, a source told ET that the supermodel is expecting her first child with Malik, adding that Hadid is 20 weeks pregnant. "Gigi and Zayn are expecting their first child together and the couple is very excited!" ET's source said. "Gigi has kept the secret close to her family and friends for a while, as she’s only a few months along. 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 couple and their families are overjoyed."