Actor Song Joong-ki on why he immediately signed on to Korean space film 'Space Sweepers'

Song Joong-ki (left) and Kim Tae-ri lead the cast of 'Space Sweepers'. Photos: Netflix

It was while Song Joong-ki was filming the hit South Korean movie A Werewolf Boy with director Jo Sung-hee in 2011 that the actor first heard about the project Space Sweepers.

Jo had been developing the story for a film set in space since 2009 after a conversation he had with a friend about all the defunct human-made objects left floating in space.