(Sechs Kies's Facebook)

First-generation idol group Sechs Kies and comedian Yoo Jae-seok will put up a collaborative performance at the MBC Entertainment Awards event Thursday.

Their preparations have been kept under wraps, but sources said Wednesday that Yoo was spotted outside a practice room looking tired after a long rehearsal.

Sechs Kies had reunited after 16 years through the show “Infinite Challenge,” which Yoo has hosted for more than a decade.

(MBC)

Yoo has collaborated with others in the music scene in the past, including Park Jin-young, Lee Juck and EXO, but fans are curious as to what will be presented this time.

Meanwhile, Sechs Kies has promised its fans that the group will be active in 2017.

By Yim Ji-min (jiminy@heraldcorp.com)