- Full name: Matthew Kim
- Date of Birth: October 20, 1992
- Nationality: American (U.S.A)
- Blood type: B
- Group: KARD
- Agency: DSP Media
- Debut: July 2017
- position in the group: King, Main dancer, lead rapper, sub vocalist
- Family members: Mom, dad, 2 younger brothers
- Nickname: Big Mat, Grasshopper
- He was born and raised in the U.S.A
- BM likes sweet food like dessert
