Renee Zellweger has advised her Bridget Jones: The Edge of Reason co-star Hugh Grant to get some exercise.

When Zellweger had to play-fight with Grant during a scene in the new movie, she noticed how out-of-shape he had become.

She told Female First, "When we did do the fight scene three years ago, I think Hugh was then spending more time on his fitness and body. It's remarkable the difference three years can make, really.

"It was certainly easier for me because he was much fleshier, and the contours were much softer - it was more like wrestling my grandmother.

"Hugh complained all the time that I was hurting him and given him bruises. Probably, if we ever do it again, I'd advise him to get in a bit of training."