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Zayn Malik, Gigi Hadid, Joe Jonas

Splash News; Al Powers/Powers Imagery

Unlike her relationship with Joe Jonas, Gigi Hadid and Zayn Malik are more than just a couple of the moment.

In fact, a source tells E! News exclusively that things are getting more serious between the duo—even Gigi's friends think it will last!

"Zayn and GiGi are getting serious," the insider tells us, explaining how they acted together while filming Zayn's latest music video. "Gigi was so excited when Zayn asked her to be in his music video. They both acted very professional on set but it was very obvious that they were in love. They couldn't stop flirting with each other. Gigi and Bella really like the fact they are in music videos with their boyfriends."

Gigi Hadid, Zayn Malik

PacificCoastNews

Some people may argue that things appeared to be pretty serious with Jonas, too, before they broke up last November. However, the source says the situations are definitely  not the same.

"This relationship is very different then when she was with Jonas," the insider continues. "Her friends think this is going to last!"

In fact, Malik went on-record for the first time Wednesday to officially confirm Gigi is his girlfriend.

Zayn Malik, Gigi Hadid, Pillowtalk Video

Luti Media

While chatting with Zach Sang & the Gang about his super sexy "Pillow Talk" music video—which featured the supermodel and has already garnered 37 million views on YouTube—he answered a question from a fan who asked,

"Was it cool to have your girlfriend in the video?"

Malik responded, "Uh, yeah. That was cool. it was something . We enjoyed it. It was fun."

Then, one of the co-hosts followed up with a second question: "No one easier to make out with than your own girlfriend, right?"

"Exactly," Malik added.

Definitive proof at last! Though we never really needed it. The couple has been pretty open about showing off their PDA since they were first linked together in November. Since then, we've spotted them out on dinner dates, photographed them apartment hunting and then watched their music video makeout session.