SEE ALSO: B1A4 celebrates 13th anniversary with sold-out fan concert series

Her agency MSTeam Entertainment rep told MyDaily on the 4th, "Son Ye Jin has officially joined the 'Infinity Challenge' cheering squad and will attend her first filming today... All of the content is kept secret. She plans to continue to work with the 'Infinity Challenge' cheering squad and will also join them in Brazil."

She'll be joining actor�Jung Il Woo�and�B1A4's�Baro, who were previously announced as part of the cheering squad,�and depart for Brazil for the '2014 FIFA World Cup'.�