Group f(x)'s member Sulli revealed pictures with his younger brother.

Today, Sulli posted on her Me2day, "My younger brother. Our baby came to support us for 'Music Core' today. He gave us kisses. Thank you San. I saw you dance during our stage" along with a picture.

In the picture, f(x) members are posing with Sulli's younger brother. Sulli's younger brother is in Victoria's arms, making cute poses as well.

Sulli had previously talked about her 3-year-old younger brother during interviews as well.

Photo Credit: Sulli Me2day