The King of Mask Singer (Korean: 미스터리 음악쇼 복면가왕; RR: Miseuteori eumaksyo bongmyeongawang; lit. 'Mystery Music Show: Masked Singer's King') is a South Korean singing competition program presented by Kim Sung-joo, with introductions by voice actor Lee Won-joon. It airs on MBC on Sunday, starting from April 5, 2015, as a part of MBC's Sunday Night programming block. It was originally broadcast as a holiday special program, but it was so popular that it became a regular program.
