Two I.O.I members have the same birthday -- Dec. 4 -- as BTS’ Jin.

Both Kim Do-yeon and Kang Mina of I.O.I turned 17 on Sunday, while BTS’ Jin turned 24.

All three stars are currently in Hong Kong for 2016 Mnet Asia Music Awards.

In Saturday’s ceremony, BTS won artist of the year and best male dance performance. I.O.I won best new female artist.

Mina of I.O.I and Gugudan turned 17. (Gugudan's official Twitter)

Gugudan members celebrate Mina's birthday (Mina's Instagram)

I.O.I's Choi Yoo-jung sent a video-recorded message to Kim Do-yeon. Do-yeon was so touched that she cried. The two belong under the same agency, Fantasio. (Twitter)

BTS' Sugar shared a funny photo of Jin on Jin's birthday. (BTS' Twitter)