Will Smith made a public promise that involves making music with Psy and performing "Gentleman" in Korea, albeit half-jokingly.

At the press conference held in Korea for his new movie, 'After Earth,' directed by M. Night Shyamalan, Will Smith announced that he will sing on stage with Psy if the movie does well in the Box Office. "I will sing mother, father, gentleman and try to make music with Psy."

Will Smith's son, Jaden, added that he will move out of his parents' house and produce an album with G-Dragon. "Or the Smiths can collaborate with YG Family. You guys can expect a lot of music from us," Jaden joked.

Previously, Will Smith visited Korea to promote 'Men In Black 2' back in 2002 and 'Men In Black 3' last May. This is his third trip to Korea and Jaden's first.

'After Earth' is staged on desolate Earth that has not seen any human activity for a thousand years until a heroic warrior Kitai Raige crash lands with his son and embarks on an adventurous journey through the post-apocalyptic wilderness.

'After Earth' will premiere on May 30 in Korea.