Katy Perry and Russell Brand are set to share their romance with millions of movie fans - the singer has made a cameo appearance as the funnyman's love interest in his new film.

The I Kissed A Girl hitmaker has been dating Brand since September (09) and is now engaged to her lover after he proposed on New Year's Eve during a sun-soaked vacation in India.

And Perry has revealed she's already put her passion for the star on tape, with a brief role in Brand's latest comedy film Get Him to the Greek.

She tells Britain's Glamour magazine, "When he was filming Get Him to the Greek, I did a cameo with him. My scene called for me to make out with him. And on the way down the stairs after the scene, I was hopping like a bunny. I hop like a bunny when I'm happy - I get a bit childlike."