O Yeong-su is the first Korean to win the Golden Globe Award of the U.S. for Best Performance by an Actor in a Supporting Role on TV for his role in "Squid Game."
On Jan. 9 in Los Angeles, he was announced as the winner of the honor at the 79th edition of the awards.
The actor has attracted global recognition for playing Oh II-nam, or Player 1, in the Netflix smash drama.
In the drama, the character captivated the world with the line "We are kkanbu (a slang word meaning "the same side" in marbles)" when giving his last marble to protagonist Seong Gi-hun (played by Lee Jung-jae).
Starting his career in 1963, O has appeared in more than 200 plays including "King Lear," "Faust," "Snow in March" and "Confession for a Black Prostitute." He received the Dong-A Theatre Award, Baeksang Arts Award and the National Theatre Association of Korea Award for Best Actor.
The actor said through Netflix after hearing of his award, "When I first heard the news, I told myself, 'I'm a decent man,' for the first time in my life."
"Now it's not we in the world, it is the world in us," he added. "While embracing the scent of our culture and love for my family deep in my heart, I thank everyone around the world. I wish you all a beautiful life."
Actor Lee was nominated for Best Performance by an Actor in a Television Series -- Drama, but lost to Jeremy Strong of "Succession."
"Squid Game" was also nominated for Best Television Series – Drama.
Run by the Hollywood Foreign Press Association, the Golden Globes are one of the most prestigious awards in the U.S. for movies and TV.