On March 20, 2026, Oh Young-joo posted a birthday-themed update on her Instagram. In the photos, she wears a cute cake-shaped headband and sits in front of a dessert topped with candles. She poses with a playful, lovable expression.
She wrote, "I don't like getting older, but I love birthdays," showing how much she enjoyed the day. The post also read, "My birthday passed a while ago, but thank you for the congratulations," expressing her gratitude to fans.
Fans left heartfelt comments such as, "So beautiful, happy birthday."