B.I talked about his family on KBS 2TV's 'Happy Together 3' on December 24.

He revealed, "My mother was born in 1973." �Park Myung Soo noted, "She's younger than me (1970) and Yoo Jae Suk (1972)." �B.I went on to say, "My father was born in 1972. �He's the same age as Yoo Jae Suk." �Yoo Jae Suk teased B.I with, "Your parents must have married quickly." �

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B.I then revealed he had a five-year-old younger sibling! �The MCs said, "Your parents must be on good terms," and he replied, "Their marital chemistry is no joke," making everyone laugh. �How cute!