Hollywood beauty Reese Witherspoon was desperate for a more challenging script while playing a doctor in upcoming movie Just Like Heaven, as she found the medical terminology in the script too easy to learn.

The blonde screen star, 29, was only too pleased to take on the role, as her mother BETTY is a trained nurse and her father JOHN a surgeon.

And Witherspoon was so keen to flex her medical muscles she started to improvise medical vocabulary.

She says, "I kept telling the screenwriter to make the medical words harder.

"I can say words harder than this. I kept calling my dad, saying, 'Give me some hard words.'"