Girls' Day members Hyeri and Yoora celebrated their 3 year anniversary.

Today, Yoora posted on her twitter, "Today is Hyeri and Yoora's 3 year anniversary. We will be together forever, ok?" along with a picture.

The two are showing off their beauty as they pose for the camera.

The two members joined Girls' Day in 2010.

Internet users commented, "Congrats to them" and "They are so cute!"