Jessica celebrated her younger sister Jung Soo-jung's birthday. On October 24th, Jessica posted several photos on her social media account with the caption, "Happy birthday to my favorite puppy."

In the posted photos, Jessica and Jung Soo-jung are standing side by side leaning against a wall, highlighting their outstanding proportions. Additionally, the two drew attention with their similar appearances and cool, elegant vibes. In another photo, the two are seen holding hands tightly while walking down the street, showing their affectionate sisterly bond.

Jung Soo-jung was born on October 24, 1994, and is currently 31 years old. She debuted in 2009 as a member of the group f(x) and has been active as a singer and actress. Jung Soo-jung received much love through her activities with f(x) and later gained recognition for her acting skills by appearing in various dramas and films.

Jessica gained great popularity as a member of Girls' Generation and is now actively working as a solo artist. The two sisters often show support for each other's activities and emphasize their family love.

Jessica's post celebrating Jung Soo-jung's birthday became a hot topic among fans, with many praising the sisters' friendship. Jessica and Jung Soo-jung are building successful careers in their respective fields, and attention is focused on their future activities.

The relationship between the two sisters positively influences many people, and their communication brings great joy to fans. Jung Soo-jung plans to continue engaging with fans through various activities in the future.