Netflix series Start-Up has only been out for a month, but it’s already made its own mark amid the bubbling K-drama crossover craze. One of the most-anticipated Korean series of the year, alongside Record of Youth , Start-Up premiered with a respectable 4.5 per cent domestic viewership rating on October 17, according to Korea Times . The first episode of the series (distributed internationally by Netflix) wowed viewers partly because of the powerful performance of actor Nam Da-reum, who portrays a younger version of Han Ji-pyeong, the second male lead. He might not be the drama’s most famous face – definitely no Park Bo-gum or Song Joong-ki – but diehard K-drama fans will already recognise him, as the 18-year-old already has more than 30 projects under his belt since debuting as a child actor. How many of these K-dramas do you now remember seeing him in? Seo Ye-ji is playing another stuck-up rich girl in Island – what we know so far Pinocchio (2014) and While You Were Sleeping (2017) Blonde haired or Black haired? #NamDareum #JungJaeChan little #Jongsuk in #WhileYouWereSleeping pic.twitter.com/w34dcXKIQk — sesshōmaruu²⁴ʰ (@fmmeidita) October 6, 2017 Nam played the younger version of the protagonist in romantic comedy TV series Pinocchio. This protagonist, however, has a dual identity: he starts out as ordinary kid Ki Ha-myung, but then takes on the name Choi Dal-po after his family is killed during a tragic sequence of events, and he’s rescued and adopted by fisherman Choi Gong-pil. Nam and actor Lee Jong-suk, who played the older version of the character, were very much in sync, and their performances resonated well with viewers. The two were reunited in fantasy legal procedural series While You Were Sleeping in 2017, where they played younger and older versions of leading man Jung Jae-chan. Nam sported blonde hair to personify Jung’s devil may care, bad boy image. A Piece of Your Mind (2020) This March, Nam played the younger version of romantic comedy series A Piece of Your Mind protagonist, Moon Ha-won. He shared the role of the kind-hearted artificial programmer with Jung Hae-in , who played the older version of the character. Fans have noted that the two actors bear a striking resemblance. Jung once described Moon as calm and poised to Esquire Korea ; someone who doesn’t express emotion due to years of experiencing unrequited love. Nam embodied this description perfectly in the flashbacks he appeared in. Which K-drama actors almost debuted as K-pop idols? Where Stars Land (2018) This romantic K-drama follows two ordinary employees working in the passenger services department at Incheon International Airport. Nam plays the younger version of male lead Lee Soo-yeon, who is distant and hides a mysterious secret. The older version of the character is played by Lee Je-hoon. Here, Nam managed to pull off the story behind the character’s accident – quite a feat for his young age. The King in Love (2017) This historical drama tells the story of Wang Won, a crown prince, and his relationships with his childhood friend Wang Rin and a beautiful woman named San. The younger Won is self-centred yet a good friend, and Nam’s brash portrayal offers a glimpse of the man Wang Won grows up to be – played by Im Si-wan. Why is Blackpink star Jisoo’s first K-drama already causing controversy? Come and Hug Me (2018) In Come and Hug Me a rookie detective and an aspiring actress are each other’s first love as children, but their budding romance ends in tragedy when the former’s father, a serial killer, murders the parents of the latter. Nam and Jang Ki-yong aced their roles in portraying the younger and older versions of detective Chae Do-jin, a character who appears to be strong and brave but who actually suffers in silence. Hotel Del Luna (2019) and Guardian: The Lonely and Great God (2016) View this post on Instagram A post shared by 배우 남다름 -엄마가 전해주는 이야기 (@namdareum_mom) on Aug 19, 2019 at 8:22am PDT Nam only had cameos in these K-dramas, playing a water spirit protecting a village well in Hotel Del Luna and a young boy who meets the protagonist, played by Gong Yoo, in Guardian: The Lonely and Great God . Want more stories like this? Sign up here . Follow STYLE on Facebook , Instagram , YouTube and Twitter .