The musician, 45, celebrated daughter Esti Maxine’s first birthday with a heartwarming post shared on Instagram Saturday.

“Esti Maxine is ONE today!” Legend wrote in his caption. “She’s been lighting up the house since day one. ❤️❤️❤️❤️.”

In one photo shared, Esti smiled as she sat next to a towering birthday cake with pink and brown icing.

In other snaps, Esti was captured kissing her reflection in a mirror, sporting a large pair of heart-shaped glasses and sitting on the floor next to a book with the title ‘Dada’ as she flashed an adorable smile.

Legend and wife Chrissy Teigen share daughters Esti and Luna Simone, 7, plus sons Miles Theodore, 5, and Wren Alexander, 6 months.

Teigen, 38, announced Esti’s arrival last January through an Instagram post. At the time, she wrote, “She’s here! Esti Maxine Stephens – the house is bustling and our family could not be happier 💕.”

“Daddy sheds nightly tears of joy seeing Luna and Miles so full of love, and I am learning you still need diapers with a c-section!? We are in bliss,” Teigen continued. “Thank you for all the love and well wishes – we feel it all! X.”

Speaking to WSJ. Magazine for its “My Monday Morning” series last February, Legend explained that he had an “emotional” time when Esti first came home.

“It was making me emotional the first two nights we were home because I just felt the love expand in the house, and I felt the excitement,” he said.

Chrissy Teigen and John Legend with all four kids.CHRISSY TEIGEN/INSTAGRAM

In November, the couple took time out to volunteer at their local Ronald McDonald House Charities (RMHC) in Los Angeles, where they cooked breakfast for the families staying there while their children receive critical medical care in the area. Legend told PEOPLE he and Teigen were excited to make it a family affair.

John Legend and daughter Esti.JOHN LEGEND/INSTAGRAM

“This was our kids’ first time at the Ronald McDonald House. We made our mochi pancakes, one of Chrissy’s recipes. And a lot of the kids that were there, some were patients, some were siblings of patients but our kids bonded with all of them quickly,” he shared. “They were playing basketball with them, having a good time. I enjoyed watching them.”

Legend also said that there’s an important lesson in that fun. “We try to teach them that it’s important to give back and to help other people,” he detailed. “They’ve gone with us to help feed people who are hungry, they’ve gone to homeless shelters with us. We try to teach them to be appreciative of what they have and also know that there are a lot of people that don’t have the privileges that they do, so we should do what we can to help them.”