The reformed Lothario was apparently pictured with a young stylist from the Rock Of Ages set in Miami, prompting a furious phone call from Perry who is currently on her world tour.
A source told Now! magazine, 'Russ isn't supposed to be photographed with any other woman, let alone holding hands.
'Katy called him and understandably went nuts.
'It's to prevent any rumours putting a strain on their marriage, especially when they're apart so much because of their work.
'There's nothing going on, of course, but it just doesn't look good.
'The girl in question is simply a wardrobe assistant from the film and their friendship's purely platonic.
'She and Russ share a joke from time to time. He was only holding hands with her because he's naturally a touchy-feely guy.'