LONDON: Megan Fox gets so angry during arguments with her on/off boyfriend Brian Austin Green she has threatened to ''kill'' him.

Megan Fox has threatened to "kill" her boyfriend during rows.

The 'Jennifer's Body' actress admits she often struggles to control her temper, leading to some explosive outbursts towards on/off lover Brian Austin Green.

She said: "My temper is ridiculously bad. I've had to say to Brian, 'You have to go and stop talking to me, because I'm going to kill you. I'm going to stab you with something, please leave.' "

The 23-year-old star admits she is so worried about her emotional reactions, she won't let herself be around firearms incase she injured Brian.

She added to Rolling Stone magazine: "I'd never own a gun for that reason. I wouldn't shoot to kill. But I would shoot him in the leg, for sure."

Megan has previously confessed she finds on-screen violence "sexy".

She said: "Whenever I can be physical it helps me a lot with the actual acting aspect. I prefer it. If I could just be either beating someone up or getting my a*s beaten in every scene I would love it. Sexy!"