While the term "maknae (youngest member) on top" might ring a bell, have you ever thought about its opposite? Some K-stars often leave fans and the public in disbelief upon revealing they're the eldest members. Here are five K-stars who, despite being the oldest, exude the youthful energy typically associated with a maknae.

1. BTS Jin: This man seems to be aging backward, whereas Jin is actually the oldest member of the group. Often times he's mistaken as being one of the youngest. Not only for his baby face but also because he loves to joke around!

2. JYJ Jaejoong: If someone came up to you and told you that Jaejoong is actually thirty-six years old, would you believe them? Due to his youthful looks and his calm and gentle personality, people often mistake him for being on the younger side than he actually is.

3. g.o.d Park Joon Hyung: Being a first generation idol and, on top of that, the oldest member in the group, you wouldn't think so because of the chill and laid-back social personality Park Joon Hyung has.

4. TWICE Nayeon: Often times people make the mistake of thinking the leader of the group is the oldest, and while that was the case with many groups in the past, as of recently, that isn't, and you can tell even within the group TWICE. Many mistake TWICE Jihyo to be the oldest member, but did you know it's actually Nayeon?

5. (G)I-DLE Miyeon: Another group where the leader is expected to be the oldest, but in reality, Miyeon is the eldest. With her joking personality and savageness, it's no surprise that people would mistake her as being one of the younger ones!

Who are some other K-stars that you first thought were the youngest, but actually turned out to be the eldest?