Fox hugged West in one of the shots and excitedly pointed to him in another, while other pics, taken by Daniel Arnold, from the memorable night showed her posing with her pals and blowing out her birthday candles.
"Thank you so much to everyone that came out to celebrate me!" Fox captioned her post. "I usually never celebrate my bday but this year was so f**king hard that it felt like I actually had something to celebrate!!"
Fox added, "I used to be so scared of getting older but I’ve found that life just keeps getting better and better!"
To mark his girlfriend's special day, West bought Fox and three of her friends baby Hermès Birkin bags, a source previously told ET.
"Julia was eating up the attention. She loved having all her favorite people in one room with Ye at her side," the source said, before adding of the 44-year-old rapper, "Ye was totally in his element. He loves making her and her friends feel special."