Check Out Gigi Hadid's Beach Birthday Photos!

Wow, Zayn and Gigi's families together? Things must be serious!

Zayn Malik and Gigi Hadid brought their families together for a beach day to celebrate the supermodel's 21st birthday on Saturday.

The former One Direction star, who has been dating the catwalk beauty since November, posted snaps via Instagram on Monday which showed him walking up a rocky beach path with Gigi and her sister Bella Hadid in an undisclosed location.

In a separate image, a topless Zayn poses with his mom Tricia, older sister Doniya, and two younger sisters, Waliyha and Safaa on a windy beach. In the caption he writes, "Chillin with the fam."

Gigi also posted a selfie from the day on Snapchat which shows her in a gingham swimsuit holding a cake with the letter "G" on top, and another to Instagram showing Bella walking along a different coastline path. Besides the snap, she simply wrote, "best birthday."

Bella celebrated her sister's birthday by wearing a black swimsuit emblazoned with the word "Gigi" in gold lettering, and showed their mother Yolanda Foster soaking up the rays on the beach in an Instagram snap.

Gigi kicked off her birthday events on Friday at a lunch with her family and continued the celebration on Sunday when she flew to Coachella music festival in California with Taylor Swift and her boyfriend Calvin Harris, who was performing there for the second weekend in a row.

Gigi shared a picture on Snapchat showing the newly peroxide blonde Taylor presenting her with a birthday cake, complete with icing that looks like fruit and vines, on the plane. In the caption, she wrote "I love you" in capital letters.

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Calvin also documented the moment by posting a Snapchat image showing Taylor and Gigi sat at a table chatting while eating the cake. He joked by writing, "Cake(s) on a plane," referencing 2006 film Snakes on a Plane.

Taylor wrote a message to Gigi on Instagram to celebrate her 21st, writing, "This beautiful, intelligent, thoughtful, hilarious person turned 21 today!!! I love you @gigihadid!!"

Kendall Jenner, on the other hand, shared a throwback modeling snap and wrote, "One of my favorite days with one of my favorite people...Happy Birthday G!!!"

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