Many Korean celebrities who've been in the industry for decades make friends with other celebrities and build friendships that last for a lifetime. Here are some of the famous Korean celebrities who go way back. Scroll down and take a look!

1-2. Park Shin HyeLee Eun Song

Park Shin Hye and Lee Eun Song have been best friends since the age of 15, when they filmed school drama Sharp. Park Shin Hye visited Lee Eun Song at the hospital when she gave birth to a baby girl last fall. Actress Lee Eun Song is married to singer Seo Taiji.

3-4. G-Dragon & Taeyang

Big Bang's G-Dragon and Taeyang are childhood friends who still show off their friendship through album collaborations. G-Dragon and Taeyang recently starred on a series of episodes of the Korean reality show Infinity Challenge, helping out a fellow K-pop singer Kwanghee. Check out G-Dragon and Taeyang on this latest episode of Infinity Challenge!

5-6. Yoon Eun HyeSon Ye Jin

Actresses Yoon Eun Hye and Son Ye Jin are really good friends.  Personal Taste actress Son Ye Jin shared how close she is to actress Yoon Eun Hye in one interview when she said, "I'm so sad Yoon Eun Hye and I haven't played for so long."   Coffee Prince actress Yoon Eun Hye shared in another interview how she and her friends play. 

"Son Ye Jin and Gong Hyo Jin don't drink well. I want to be a lightweight too but unfortunately I can drink a lot," Yoon Eun Hye said, adding when they hang out, they drink coffee instead of alcohol. 

7-8. Jo In Sung & Kim C

 It's Okay That's Love actor Jo In Sung is good friends with Korean celebrity Kim C, who helped Jo In Sung go on secret dates with actress Kim Min Hee. Jo In Sung and Kim Min Hee dated since 2014 and broke up last fall.

9-10. Choi Ji WooYoo Ho Jung

Beautiful actresses Choi Ji Woo and Yoo Ho Jung on Healing Camp said they're more like sisters than friends. Choi Ji Woo and Yoo Ho Jung have known each other since the age of 19 and traveled to three countries together. Choi Ji Woo said she gets jealous when her unni Yoo Ho Jung takes care of other friends. 

On Grandpas Over Flowers, Choi Ji Woo told Lee Suh Jin she's good friends with actresses Lee Yeon HeeSong Hye Kyo and Kim Tae Hee. "Yeon Hee comes over to my house to drink. Hye Kyo, Tae Hee and I go watch movies together," Choi Ji Woo said.

11-13. Jo In SungSong Joong Ki Lee Kwang Soo

Hot actors Jo In Sung, Song Joong Ki, and Lee Kwang Soo are good friends who traveled to Thailand together this June. They became friends after filming dramas and movies together. In July, Jo In Sung and Song Joong Ki visited an episode of Running Man to see their best friend Lee Kwang Soo. 

14-15. Gong Hyo JinKang Hye Jung

Actresses Gong Hyo Jin and Kang Hye Jung are really good friends. Gong Hyo Jin was spotted traveling with Kang Hye Jung on an episode of The Return of Superman. On the episode, Kang Hye Jung said she and Gong Hyo Jin were members of Kiki 88, a group of friends who modeled for the fashion magazine Kiki. Last winter, Gong Hyo Jin and Kang Hye Jung performed in the musical Rita.

16-17. Cha Tae HyunUhm Tae Woong

Producer's Cha Tae Hyun and Architecture 101's Uhm Tae Woong are old friends who filmed 2 Days 1 Night together. Cha Tae Hyun and Uhm Tae Woong are now married with kids. On The Return of Superman, Cha Tae Hyun visited Uhm Tae Woong's house and showed him how to take care of three children at once.

Who else should be on the list? Which friendship surprised you? Tell us in the comments below!