Discover the talented Love Alarm Cast the hit Korean drama about love, technology, and relationships. Featuring Kim So-hyun, Song Kang, and Jung Ga-ram, the series explores the emotional complexities of modern romance, with a cast that brings the story’s characters to life with depth and charm.
Table of Contents
Introduction

Love Alarm is a popular South Korean drama that gained international recognition for its intriguing premise and strong performances by its lead cast. The series, based on the webtoon of the same name, revolves around a revolutionary app that notifies users when someone within a 10-meter radius has romantic feelings for them. Set in a world where love is influenced by technology, Love Alarm explores the complexities of relationships, love triangles, and the impact of technology on human emotions.
The show features an exceptional cast, led by Kim So-hyun as the female lead Jo Jo, who finds herself caught in a love triangle between Song Kang (as Hwang Sun-oh) and Jung Ga-ram (as Lee Hye-young). Their performances bring depth to the characters and elevate the emotional drama, making the series a captivating watch. With themes of love, friendship, and the consequences of living in a tech-driven world, Love Alarm has become a must-watch for K-Drama fans.
Love Alarm Cast
Kim So-hyun as Jo Jo
- Role: Jo Jo is the female lead in Love Alarm. She’s a high school student with a tragic past and a complicated love life. Jo Jo’s life is transformed when she becomes entangled in the world of the Love Alarm app, which notifies her when someone within a 10-meter radius has romantic feelings for her. As the app forces Jo Jo to navigate her feelings, she finds herself torn between two very different men—Hwang Sun-oh and Lee Hye-young. Kim So-hyun brings immense depth to Jo Jo’s character, portraying her vulnerability, strength, and emotional journey with grace.
- Actor’s Background: Kim So-hyun is a renowned actress in the Korean entertainment industry, known for her roles in both historical and contemporary dramas. She has received praise for her ability to handle complex roles with emotional range. Some of her notable works include Who Are You: School 2015, The Moon Embracing the Sun, and Riverside Mukbang.
Song Kang as Hwang Sun-oh
- Role: Hwang Sun-oh is one of the male leads in Love Alarm. He is a popular, charming, and rich high school student who falls in love with Jo Jo. As a character, Sun-oh is confident and often playful, but his feelings for Jo Jo are intense and sincere. He struggles with the idea of love being controlled by the app, making his relationship with Jo Jo even more complicated. Throughout the series, Sun-oh’s journey is about understanding love, trust, and vulnerability.
- Actor’s Background: Song Kang has quickly risen to fame with his performances in K-dramas, particularly for his roles in Navillera and Nevertheless. His ability to bring depth to characters with both emotional complexity and charm has made him one of the most promising actors in recent years.
Jung Ga-ram as Lee Hye-young
- Role: Lee Hye-young is the second male lead in Love Alarm, and he represents a quieter, more reserved form of love compared to Sun-oh. Hye-young has long been in love with Jo Jo but keeps his feelings hidden, especially as he knows Jo Jo’s connection with Sun-oh. Hye-young’s role in the series delves into the concept of unrequited love and the difficulties of navigating romantic feelings in a world where emotions are constantly being measured by technology.
- Actor’s Background: Jung Ga-ram is known for his performances in Love Alarm and other popular dramas like The Liar and His Lover. He brings a calm and thoughtful presence to his role, which contrasts with the more intense and dramatic moments of the show. His understated performance as Hye-young has won the hearts of many viewers.
Supporting Cast
Lee Si-eon as Kim Jo-jo’s Grandfather
- Role: Jo Jo’s loving and supportive grandfather who has raised her after the loss of her parents. He is a gentle and caring figure in Jo Jo’s life and provides emotional support throughout the series. His presence serves as a source of comfort for Jo Jo as she navigates the challenges of love and life.
Kim Shi-eun as Lee Yuk-jo
- Role: Lee Yuk-jo is Jo Jo’s best friend, providing emotional support and advice during Jo Jo’s complicated love triangle with Sun-oh and Hye-young. Although her role is more of a supporting character, Yuk-jo’s presence offers insights into the dynamics of friendship and love in the series.
Go Min-si as Lee Hye-young’s Sister
- Role: Lee Hye-young’s younger sister plays a more minor but still important role in Love Alarm. Her character contributes to the emotional moments of the series, as she is often a source of support for her brother.
Kim Jong-gu as Kim Jo-jo’s Father
- Role: Kim Jo-jo’s father is an important figure in her backstory. Although his role is more indirect in the series, his actions and past significantly influence Jo Jo’s emotional journey and provide context for her relationships and struggles.
Song Geon-hee as Park Gyo-young
- Role: Park Gyo-young is a secondary character who is involved in some of the romantic subplots and social dynamics in the show. His character provides added layers to the emotional narrative and helps develop the themes of love and relationships.
Lee Joo-young as Choi Sun-oh’s Friend
- Role: A friend of Hwang Sun-oh, this character plays a minor yet important role in helping to shape the social dynamics and conflicts surrounding Sun-oh’s feelings for Jo Jo. Their interactions add depth to the plot and support Sun-oh’s character arc.
Jung Seung-jo as Jo-jo’s Classmate
- Role: Jo-jo’s classmate is another minor supporting character who adds context to the story’s school setting. While not central to the romantic plot, they contribute to the high school drama atmosphere in the series.
Conclusion
In conclusion, Love Alarm is a compelling K-drama that effectively combines the themes of romance, technology, and personal growth. The main cast, led by Kim So-hyun, Song Kang, and Jung Ga-ram, delivers strong, emotional performances that bring the love triangle to life, exploring how technology impacts relationships and personal feelings.
The supporting cast further enriches the narrative, offering emotional depth and supporting the characters as they navigate the complexities of love, friendship, and identity in a tech-driven world. The dynamic between the main and supporting characters helps create a well-rounded story that resonates with viewers, making Love Alarm an engaging and relatable series for anyone interested in love stories influenced by modern-day technology.
Be My Boyfriend Cast & Their Role (2021) Korean Drama
(FAQs)
Who plays the main character, Jo Jo, in Love Alarm?
Kim So-hyun plays Jo Jo, the female lead. She brings depth and vulnerability to the character, portraying Jo Jo’s emotional journey as she navigates love and loss in a world shaped by technology.
Who are the male leads in Love Alarm?
The male leads are Song Kang as Hwang Sun-oh and Jung Ga-ram as Lee Hye-young. Sun-oh is charming, rich, and confident, while Hye-young is quiet, reserved, and has been in love with Jo Jo for a long time.
Has Kim So-hyun worked in other notable dramas?
Yes, Kim So-hyun is a well-established actress in the Korean drama industry. Some of her other notable works include Who Are You: School 2015, The Moon Embracing the Sun, Riverside Mukbang, and The Emperor: Owner of the Mask.
What other roles has Song Kang played in his career?
Song Kang has gained significant popularity for his roles in Navillera, Nevertheless, and Sweet Home. His portrayal of complex, relatable characters in romantic and dramatic settings has earned him a strong fanbase.
Is Love Alarm Jung Ga-ram’s first major role?
No, Jung Ga-ram has appeared in other dramas, such as The Liar and His Lover and The Liar and His Lover. However, Love Alarm brought him widespread recognition and marked a breakthrough role for him as a romantic lead.
How does the cast of Love Alarm compare to their roles in other projects?
The cast of Love Alarm showcases their versatility in their respective roles. While Kim So-hyun has often played strong, resilient characters in historical dramas, in Love Alarm, she portrays a more modern and emotionally vulnerable character. Song Kang and Jung Ga-ram also bring fresh dynamics to the series, with both actors showcasing their romantic and dramatic range.
What is the chemistry like between the main cast members?
The chemistry between the main cast—Kim So-hyun, Song Kang, and Jung Ga-ram—is widely praised. Their interactions are natural, making the love triangle between Jo Jo, Sun-oh, and Hye-young emotionally charged and relatable. The tension between the characters adds to the show’s drama and emotional depth.
Do the cast members of Love Alarm have any future projects?
Yes, many of the cast members, such as Kim So-hyun, Song Kang, and Jung Ga-ram, are involved in future projects. Song Kang has been busy with projects like Nevertheless and Navillera, while Kim So-hyun has appeared in other major works. Jung Ga-ram is also continuing to take on new roles in upcoming dramas.
Are the cast members friends in real life?
While it’s hard to say definitively, there are many signs of camaraderie and strong working relationships among the cast members. Behind-the-scenes videos and interviews show the cast interacting warmly, which likely contributes to their natural chemistry on-screen.
What makes the cast of Love Alarm stand out?
The cast of Love Alarm is praised for their emotional performances, bringing depth to their characters in a story that mixes romance with modern technology. Each actor has successfully portrayed complex emotions and relationships, making their roles resonate with viewers and adding to the show’s popularity.