Crown Prince Hyomyeong (18 September 1809 – 25 June 1830), personal name Yi Yeong, and posthumously honored as King Munjo, was a member of the Joseon dynasty.

Known to have pursued various political reforms, the prince served as Regent in 1827 until his death 3 years later at age 20.

[2] He did have some enemies amongst his maternal relatives, but avoided nepotism and was a talented writer, composer and choreographer.

The prince was commemorated in an album of six scenes created to celebrate the commencement of his learning at the Songgyungwan, one of a number of documentary paintings (gungjung girokhwa) of the Joseon period.

Crown Prince Hyomyeong has the longest posthumous name for a member of nobility of Korea.