2PM's Taecyeon finally revealed the birth secret that he is the twins' biological father on 'Very Good Days'.

SEE ALSO: Hyomin reveals adorable photo with husband on her wedding day

On the April 19 episode of KBS 2TV's 'Very Good Days', Kang Dong Hee (Taecyeon) went camping with his twins (Kang Dong Joo and Kang Dong Won) who he raised as his dongsengs and then made the shocking confession.

Kang Dong Joo (Hong Hwa Ri) told Kang Dong Hee (Taecyeon), "Tell us who our biological father is... Stop looking elsewhere. Look straight into our eyes and tell us." Kang Dong Hee (Taecyeon) confessed to them, "I'm your father. I'm your father."

Kang Dong Joo was still in disbelief, telling him, "If oppa keeps joking around like that, I'm going home." Taecyeon replied, "I'm not joking. It's true that I'm your father... I'm sorry for keeping it a secret up until now", bringing the twins to tears.

Also check out his 'beastly' punching in another scene below!