50 Cent 'attacked movie co-star'

50 Cent reportedly attacked a co-star in his new movie after he was accused of failing to learn his lines.

The rapper allegedly got into such a "heated argument" with Righteous Kill actor Frank John Hughes that paramedics had to be called to the set.

A source told MediaTakeOut.com: "Frank tried to correct [50 Cent] and he got really upset... Before it was all over he had Frank on the ground pummelling him.

"The paramedics looked at Frank and he's OK. It's everyone else here that's still shaken up... No one is trying to get on [50 Cent's] bad side."