Zayn Malik and Gigi Hadid are "getting serious".

Gigi Hadid

Gigi Hadid

The former One Direction star and the 20-year-old beauty are "in love" and their pals couldn't be more thrilled about their budding romance.

A source told E! News: "Zayn and Gigi are getting serious. 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 [her sister] really like the fact they are in music videos with their boyfriends ... This relationship is very different then when she was with Jonas. Her friends think this is going to last!"

Meanwhile, the model previously revealed the pair keep things "positive" for the sake of each other.

She shared: "We cope with the trolls by having each other. It's the same thing as dating someone within the industry rather than out of the industry. You only understand it when you're literally experiencing it."