The Modern Family star attended a reading session with a group of young children to read from a Sofia the First book. (Winter, 17, voices the titular character on Disney Junior.)
She walked out onto the stage in a green dress and waved at fans before sitting down with a real-life version of her TV character. She also posed for photos with Sofia on the red carpet.
Winter’s decision to go public with her breast reduction has caught a lot of attention online this week.
“[My chest size] made me feel really uncomfortable, because as women in the industry, we are totally oversexualized and treated like objects,” Winter told Glamour of the body bullying and physical pain that she endured before undergoing surgery.
“I was 15 years old with [size] F [breasts],” Winter said. “How do you navigate that?”
Like her character on Modern Family, Winter is also levelheaded – and Ty Burrell, who plays her on-screen father Phil Dunphy on the show, agrees.
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“You know, I think the world of Ariel and just think that she’s just so grounded,” he told PEOPLE at D23 on Friday.