The 35-year-old, who rarely shares photos of her children on social media, called Honey Krissy her “ginger angel” in the caption.
“Beyond blessed you’re in our lives little lady #honeykrissywood ❤️❤️❤️❤️,” she wrote.
Cotton is also mum to three-year-old Rex with her husband Jesse Wood.
She also shared a snap of her daughter’s heart-shaped birthday cake.
Cotton took the opportunity to wish her daughter’s godfather, Gok Wan, a happy birthday, too.
“Also happy birthday to Honey’s godfather @therealgokwan,” she added. “We all love you to the moon and back special man.”
Wood and Cotton got married in July 2014. They revealed the following February they were expecting their second child together.