Singer Jo Sung Mo, who is currently starring as Joseph in the musical 'Joseph and the Technicolor Dreamcoat', couldn't contain his joy during his surprise birthday party on set.

Jo Sung Mo was surprised with an early birthday party before March 11th planned by musical actors Choi Jung Won, Lee Jung Yong, and the rest of the cast and crew. Jo Sung Mo was tricked into thinking that it was someone else's birthday and as he began to sing "Happy Birthday", the crew stopped him in his tracks with a birthday cake. He clearly couldn't contain his joy, and his eye smile left fans smiling along with him.

Netizens commented, "Jo Sung Mo looks so happy," "The team atmosphere is filled with positive energy," and "Jo Sung Mo's eye smile is cute."

Lucky fans in Korea can go watch 'Joseph and the Amazing Technicolor Dreamcoat' at the Charlotte Theater in Jamsil, Seoul until April 11th.

Happy Birthday to Jo Sung Mo!