Russell Brand and Katy Perry dress up as "bag ladies" to get some privacy.

The famous couple have been forced to take drastic measures so they don't get recognised wherever they go - though the British funnyman claims it is much easier for his fiancee to disguise herself than for him to go Incognito.

He explained: "Do I ever go out in disguise? Yeah, I can't tell you what it is, actually I can because you might think it's someone else.

"I put on some specs, then I bend over like an old man and go out with Katy holding a cane and we dodder around like a couple of bag ladies.

"The thing about female pop stars, all they have to do is not wear so much f***ing make-up and no one knows who they are!"

The 'Get Him to the Greek' star - who was recently arrested following an altercation where he allegedly tried to stop a photographer taking pictures up Katy's skirt - admitted he gets jealous of the attention the 'Teenage Dream' singer receives from other men, but wouldn't want her to be less attractive.

Speaking at a show to launch his new autobiography 'My Booky Wook 2: This Time It's Personal' last night (30.09.10), he told the audience at London's Hackney Empire: "I want to take care of her and love her, but everything about her being sexy and desirable to other people, frankly, if she lost them I'd be on the phone to Lady GaGa."

'My Booky Wook 2: This Time It's Personal' is on sale now.