Jung Gun-joo (Jeong Geon-ju), born May 26, 1995, in South Korea, is a South Korean actor. He began his career appearing primarily in web series and productions aimed at young audiences. In 2018, he landed the role of Choi Woong in Flower Ever After, and then appears in A-Teen, The Third Charm and WHY, where he plays the lead role of Cha Yeon-woo. He then reprises the role of Choi Woong in The Best Ending in 2019.
His career took a major turn that same year with Extraordinary You. In it, he plays Lee Do-hwa, one of the main characters in this fantasy romantic comedy—a role that brought him significant recognition among audiences. Around that time, he joined the agency Blossom Entertainment.
In 2020, Jung Gun-joo landed one of the lead roles in Oh My Baby, in which he plays Choi Kang-eu-tteum. He also makes a memorable appearance in True Beauty as the baseball player Ryu Hyeong-jin. The following year, he played Shin Gyeom, a young photographer, in the romantic comedy Monthly Magazine Home.
After a few appearances in 2022, he returned to the spotlight in 2023. On the big screen, he plays the basketball player Jung Kang-ho in Rebound, while on television he plays the role of Jung Yoo-ha in the historical drama The Secret Romantic Guesthouse.
In 2024, he played Moon Tae-oh in Bitter Sweet Hell, then Cheon Jun-hwa in Check-in at Hanyang. In 2025, he appears in Way Back Love and in the action series Mercy for None. He has also been announced as the headliner for M2020, scheduled for 2027, as well as the series My Deresa, in which he will play Yoo A-ram.
