Moon Sang-min was born on April 14, 2000, in Cheongju, North Chungcheong Province.

He graduated from the Fashion Model Department at Hanlim Multi Art School,[3] and is currently attending Sungkyunkwan University.

[5] His performance as Grand Prince Seongnam led to an increased popularity and recognition for him, and reportedly more than 20 advertising deals were offered to him by various companies.

[6] On January 2, 2023, Moon Sang-min was selected as a model for the domestic watch brand Romanson.

[8] On September 2, 2024, it was announced by Lullua that they had selected Moon as the ambassador for their beauty brand.