Mr. Queen (Korean: 철인왕후) is a 2020 South Korean television series based on the Chinese web series Go Princess Go. Directed by Yoon Sung-sik, it stars Shin Hye-sun as Queen Cheorin and Kim Jung-hyun as King Cheoljong. The drama is about Queen Cheorin finding herself with the soul of a modern-day man inside her body, and King Cheoljong striving to be a king who helps his people. It aired on tvN every Saturday and Sunday at 21:00 (KST) from December 12, 2020, to February 14, 2021.

Despite its controversies, the series is the eleventh highest rated drama in Korean cable television history, with the last episode reaching a nationwide rating of 17.371% and garnering more than 4 million in viewership. It also set a record for tvN by achieving the 5th highest rating in the network's history.