Girls’ Generation’s Jessica Jung revealed a photo of herself and her younger sister, f(x)’s Krystal Jung, taken when they were young, attracting much interest from fans of the two girl groups. The two are known as South Korea’s “Olsen twins.”

“Don’t forget to watch ‘Jessica & Krystal’ on OnStyle tonight,” Jessica added on her SNS account, Weibo.

In the photo, Jessica is smiling toward the camera with Krystal, who was then an infant, in her arms. The duo’s well-defined features even as young children caught the eyes of the fans who responded with “So cute!,” “Pretty babies grow as they were,” and “Resemblance,” to the picture.

The episodes of “Jessica & Krystal,” a reality program that captures the two singers’ daily lives as sisters who work in K-pop industry, air on every Tuesday at 11:05 p.m. on cable channel, “OnStyle.”

By Ha Ji-won, Intern reporter (jiwonha@heraldcorp.com)