Wearing a green romper with multiples ring accessories, the 17-year-old read from a Sofia the First book while a select group of young children listened in.
In addition to her role on Modern Family, the actress also voices the title character on the Disney Junior series.
"#D23," Winter wrote on Twitter hours before story time. "Can't wait to meet all the fans today!"
The young adult has received lots of attention in recent days after opening up about her breast reduction surgery.
In a candid interview with Glamour magazine, Winter explained that she couldn't ignore the constant chatter in the media about her cleavage. As a result, the red carpet pro decided to reduce the size of her breasts from a 32F to a 34D.
"Every article that has to do with me on a red carpet had to do with ‘Ariel Winter's Crazy Cleavage!' or ‘Ariel Winter Shows Huge Boobs at an Event!'" she explained to the publication. "That's all people would recognize me by—not, ‘Oh, she does great work on Modern Family.'"
Back problems, neck pain and posture also contributed to her decision to go under the knife—a choice she decided with help from doctors' guidance.
"I feel great. It was such a quick recovery for me. I was up and running within five days. The feeling of not having so much there was such a relief!" she explained. " Once the surgery was completed, I can't even explain the feeling."
She continued, "[A week later], I was buying clothes and crying as I put them on, I was so happy. You just feel so relieved and excited. You feel like a new person."