Justin Timberlake's Injury Shuts Down Production on 'Now'Justin Timberlake is known for his fancy footwork, but that didn't keep the star from suffering a leg injury on the set of his latest film.

The 'Social Network' star was performing a stunt on the set of his latest film when he injured his calf muscle, making him unable to work.

Timberlake, who has been shooting 'Now,' a thriller by 'Gattaca' writer/director Andrew Niccol, is using crutches until his injury heals, forcing the film's production company, Strike Entertainment, to temporarily stop filming.

According to an E!Online source, "[Timberlake] hasn't heard anything about the MRI results, but they're freezing production until he's off crutches and able to act again."