Good Boy (Korean: 굿보이) is an ongoing South Korean action comedy television series written by Lee Dae-il, directed by Shim Na-yeon, and starring Park Bo-gum, Kim So-hyun, Oh Jung-se, Lee Sang-yi, Heo Sung-tae, and Tae Won-seok. It centers around former sports heroes who become police officers. The series had its world premiere in Bangkok, Thailand attended by Park, Kim, and Lee on May 31, 2025. It premiered on JTBC on the same day and airs every Saturday and Sunday at 22:40 (KST). It is also available for streaming on several platforms including Netflix and Disney+ in South Korea, and Amazon Prime Video globally.

The series received positive reviews and earned praise for its pacing, stylish direction, blockbuster-level production, original soundtrack, and Park's compelling performance as an action hero.