Zayn Malik celebrated his first Father's Day as a father on Sunday, and girlfriend Gigi Hadid marked the occasion with a very sweet Instagram photo. In the snap, Malik is holding baby Kai, who was born last September, and looking at an illuminated globe." Our Kai is so lucky to have a daddy who loves her so much and would do anything to make her smile! We are so thankful for the little being that you are," Hadid captioned the post. 'We love you so much.'

Hadid also shared a photo of her own father, Mohamed Hadid, pushing Kai in a stroller." Happy Father's Day my Dadio @mohamedhadid I love you so much and I love seeing you being the sweetest Zeed for Kai!" She wrote.

Malik appeared on iHeartRadio's Valentine in the Morning in March and opened up about becoming a dad. 'Honestly, it's going to be great,' she said. But honestly, she's a great baby. It's been really easy for me and for the gig"

. [She sleeps well and loves her milk. Now all I do is feed her and change her diaper," he continued. 'It's been a lot of fun.'