My Unfamiliar Family, Lawyer Min-woo cameoed by Kwon Yul.

He was a bright ray of sunshine in the show as well as in Eun-joo's life.

Kang Ki-young in What's Wrong with Secretary Kim. Every time he'd call Park Seo-joon "owner-ya", I'd giggle. His comments and analogies were always on point and he helped humanise Young-joon's character.

Kevin in Doom at Your Service.

#justiceforkevin

Teo Yoo as Yoo Jin-han in Money Game. He steals the scene from Go soo and Lee Sung-min. How isn't he great?

Don’t know if I’d call him my favorite, but most recently, Oh Dae-hwan as Royal bodyguard Kang Tae-ho in The Red Sleeve. He was just hilarious.

Kwak Dong Yeon in *anything*
(Lead role when?)

Choi Si-Won in "She was pretty". Baaaaaad case of SLS. Even though he wasn't a tertiary character at all, he was definitely a scene stealer.

Oh my god I have SO MANY to name! Here goes:

Lee Hee Jun. He is my most favorite scene stealer.

Oh Dae Hwan. Every time.

Lee El, before she deservedly got lead roles.

Park Jin Joo. Everybody's favorite scene stealer.

Tae In Ho. Again every time.

Kim Hae Suk. She still gets lead roles from time to time. But even when she isn't the lead she is the one shining.

Oh Ui Shik. When I first saw him I thought he caught my eye because of his resemblance to Lee Hee Jun. But it has been many years and he has been a scene stealer for me in every show. So it is safe to say it is not because of their resemblance.

Lee Elliya.

Lee Sung Min. He is incredible.

Song Sun Mi.
I can't leave her and Lee Sung Min's romance in Miss Korea out of this discussion. They were the best secondary couple ever! I loved them and I rewatch the show again and again for their scenes.

I might be back when I remember more favorites!

Inzaghi in Vincenzo :-D

Kim Nam-hee - especially Sweet Home and On the Verge of Sanity.

Park Jin-joo in Jealousy Incarnate as deadpan Nurse Oh Jin-joo, While You Were Sleeping as sassy assistant Moon Hyang-mi, It's Okay to Not Be Okay as quick-witted art director Yoo Seung-jae, and Our Beloved Summer as brutally honest best friend Lee Sol-yi. On top of that, she can sing.

Park Jin-joo in almost all her second lead roles.
She Would Never Know's Lee Jaewon.
Dr Do Jaehak in Hospital Playlist.
WWWSK's Vice President Park played by Kang Ki Young.

Asking who my favourite scene stealer is and Woo do-hwan's face just sexily staring at me answers it all.

What more can I say, Eun-seobah?

Kim Jae Kyung as Veronica Park in The Secret Life of My Secretary. I just love her and KJK's portrayal of this chaebol heiress.

Kwak Dong Yeon as Jang Han Seo in Vincenzo. I love the poor abused rich boy and his issues.

Kwak Dong Yeon as Kwon Gi Do in IOTNBO. He literally stole every scene he was in.

Both of them need to lead a drama soon!

Kim Woobin
Woo Dohwan

Lee El, in Hwayugi, Goblin, and Liar Game - with special props to the first two, because that awesomeness is accentuated with colors - burning red lipstick and clothes in Goblin, and fifty shades of purple lipsticks in Hwayugi. I'd watch the scenes where she was doing her supporting in her supporting role with her purple lipstick, and somewhere towards the end of it I would notice: Oh, look, there were other people in this scene too...

Kim Seul-gi in Flower Boy Next Door as the sleep-deprived editor.
Ye Ji Won in Another Oh Hae-young and Still 17
Im Joo-eun's character in WIld Romance.

Hwang Bora and Kim Won-hae in many things. I see them on screen, I perk up!

Cheon Ji Ho (played by the great Sung Dong Il) from Chuno!

Choi Min-soo as a villain in LAWLESS LAWYER. When Lee Joon-gi and Choi Min-soo were in a scene together LJG didn’t have a chance. What CMS did wasn’t ‘stealing’ it was ‘highway robbery”! He was great. You could tell he had a ball playing bad guy Ahn Oh-joo in LL.

Seo Kang Joon was a such a scene-stealer as Baek In-ho in Cheese in the Trap that production on the show was ruined. His power.

Min Sung Wook in many things, but particularly as Son Myung Woo in Hello Monster. He was excellent in that drama.

Hwi in When the Weather is Fine <3

Yoo Yeon-seok in Mr Sunshine. He was so electric. Feral and cold blooded when slashing his swords, scorching in his love... I could have watched him just brood for hours.

Kwak Dong Yeon.

Just as like. A general human being. In everything he ever does.

And then obviously, my beloved Bead Boy, and Magic Horse I think has to count, because I wouldn't have made it through Arthdal without him, thanks @magichorse

Sohn Ho-joon in The Light in Your Eyes. He was so pathetic and hilarious, he kept me guffawing in an otherwise heavy show. He also did great in My Secret Terius

Ryo Kyung Soo in confession, that I'm become his admire after that performance...

Lee Joo Myung in 25 21.
I don't know why 25 21 writer didn't show many squad moments in final eps. I just don't know.
The writer not only made Hee do and Hi Jin strangers but also made the Squad strange.
We all get busy but true friendship always find time to hangout.
For me 25 21 ending is too unrealistic from friendship angle both.

Ra Miran & Kim Sung-kyun in Reply1988
Byun Yohan in Misaeng
Lee Kyu-hyung in Prison Playbook
Lee Joon in Bulgasal

Hands down to all of them.

Actors
Kang Ki Young: everywhere, everytime.
Seul Gi: everywhere, everytime.
Jin Joo: everywhere, everytime.
Lee Yi Kyung: everywhere, everytime.
Oh Na Ra: everywhere, everytime.
Yoon Se Ah: everywhere, everytime.

Characters
Jeremy (You're Beautiful)
The teacher (Uncle)
Kim Bum's character (BOF)
Min (Hello Monster)
Ahjumma (Healer)
Sung Hoon's hair (Faith)
Bo Ra (Reply 88)
Dong Ryeong (Reply 88)
Jin Joo (Five Children)
Man Soo (Black)
Lee Kyu Hyung's character (Prison Playbook)
Jin Mi (Dae Jang Geum is Watching)

Characters I liked so much that made me finish dramas I didn't want to finish:
Kim Mi Jung's character (Mr Sunshine)
Veronica Park (TSLOMS)
MJ, Ung's parents (Our Beloved Summer)
Kim Bum's character and his family -his sister/daughter, her boyfriend and the kid-(The Tale of the 9 tailed)

SLS?
Yu Rim (25-21): after the umbrella scene in EP1 my ship was Hee Do and Yu Rim and BYJ was just HD's bestie. Tbh.
Taec (Dream High)

I have such a good memory for this kind of stuff, Jesus.

Woo Do-Hwan has already been mentioned but he's worth repeating 😄

Ye Ji-Won and Kim Ji-Seok from Another Miss Oh - the show itself was a big fat letdown but I LOVED those two, and dearly wish someone savvier than me would edit together all of their scenes into one big clip so I could do a Jin-Sang/Soo-Kyung rewatch. I 💖 them.

Gonna say it again cos he deserves it: Woo Do-hwan freaking out over meeting himself in TKEM. That scene will live rent free in my head FOREVER.

Hwang In-yeop's "Okey Dokey" in TB. Masterpiece.

Song Joong-ki in Sungkyunkwan Scandal - I ffd a fair bit, but always took time to watch his scenes. Gu. Yong. Ha.

And another mention for Kwak Dong-yeon in IOTNBO. Profoundly, profoundly moving. And his death in Vincenzo is up there too.

Jung Kyung ho: He usually plays the lead but when he doesn't, he makes sure you're only looking at him.
Lee Soo Hyuk: It's much more about LDH himself than any of his characters. The man has a presence you can't ignore. Speaking of presence...
Yoo Yeon Seok: He shone in Mr Sunshine, what a presence.
Byun Yo Han: I wish he'd work in dramas more often.
Jang Hye Jin: I've liked her in everything she's been in.
Park Jin Joo: She gives her characters a quirky twist that noone can ignore her. The deadpan nurse from JI was the best.

Yoon Bo-mi in Because This Life Is Our First.

Hwang Bo-ra in WWWSK and Business Proposal.

Honorable mention to Chansung in WWWSK and in Touch Your Heart. I didn't know he was an idol before seeing him act, and now every time I see a 2PM video I think he's an interloper who's somehow gotten on stage.

Seo Ji-Hoon in Flower Joseon Detective Agency, My First Love, and others. When is he finally going to get the girl??

For me, it definitely was Lee Jae Wook (seol Ji Hwan) in Search: WWW. As a rookie actor and love interest of Lee Da Hee (the second female lead), it stole every scene he was in! His story arc with Cha Hyeon was so cute and swoon worthy!

some ahjussis like in Louie or My love from the star... also Kang Hanna in MRIAG
sometimes also the village ahjummas and their flowered pants anywhere

Nam Yoon Su as Lee Hyun in the King's Affection, he didn't just steal scenes, he stole the whole show. I couldn't get past him in that drama!

Han Yeri, Kang Han-na and Park Eun-bin. Supporting roles or lead roles, it doesn't matter.

Kim Sun-Ho in Start-Up
Cho Jung-Seok in What's Up and The King's 2Hearts
Lee Kyu-Hyung in Prison Playbook (with Jung Hae-In)
Nam Ji-Hyun and Kim Soo-Hyun in Will it Snow for Christmas? (I'm still waiting for a reunion >_<)
Kang Na-Heul in Scarlet Heart Ryeo
Da Hee in Monstar

and many others!

Forgot my girls the first time around. Not surprised because men are given more interesting roles usually but thankfully things are changing now.
Lee Da hee
Choi Yeo Jin
Go Won hee
Seol in Ah
Shin Hye Sun
Kang Ha Na
These girls in everything are the scene stealer. Wishing for more lead roles for the ones who couldn't get one yet.

Yeom Hye Ran Jo Seung Woo's badass secretary in Life and the badass lawyer in When the Camellia Blooms - she's awesome!

1. Woo Do-hwan in King Eternal Monarch.
2. The actress who played Shin Min ah's best friend , Mi Sun in Hometown Cha Cha Cha
3. Oh Jung Se in every drama.
4. Park Jin-joo in every drama