The 40-year-old finds Courtenay, 75, very charming and fun, reported online media.
"Tom Courteney who I'm in love with. I need a little big of hocus-pocus magic voodoo to try and get him to be, like, 40 years younger. He's so charming, so much fun - he's got such a great spirit," Diaz said.
The 'Charlies Angels' star also said that she does not wish to see his earlier works as it will upset her.
"I don't want to watch him in a film when he is younger - my heart would break. Like, literally. I don't want to tease myself with what could have been," she added.