Movie star Russell Crowe’s fluctuating weight gets almost as much press as his outbursts of rage so people may listen to his new dieting advice.
He now claims people who want to lose weight should forget about dieting and take up boxing as it's much more effective.
The 40-year-old new dad is currently in peak condition for his boxing film Cinderella Man and puts his fitness down to being in the ring.
He says: "I've lost five and a half pounds in three days.
"This is how you do it. Get a boxing ring, hot lights and a friend to beat the s*** out of you."