Girls' Generation's member Hyoyeon congratulated Yoona on her 26th birthday.

"Yoona, happy birthday," posted Hyoyeon on her Instagram on Saturday along with a picture.

In the picture, Yoona and Hyoyeon are posing in front of the Girls' Generation poster. Yoona celebrated her 26th birthday on this day.

Girls' Generation is currently working on a new album.