His little black booky wook has been a trusty companion over the years – but now it’s a closed chapter to groom-to-be Russell Brand.

He won’t be needing all those ladies’ phone numbers any more because, ahead of his nuptials to Katy Perry, the reformed lothario has pledged to remain faithful.

Russell, 34, said: “You have to be. That’s one of the things about this institution of marriage, I’ve recently had explained to me by my wife. You must be faithful.

“And I don’t have a problem with that. I’m really, really in love.”Then he adds: “Well, I mean. You know, it’s sort of odd isn’t it, because there is certainly a compromise.

“You just can’t maraud through life f***ing whomever you’d like. Which is a shame ’cos I wish I actually could do that. That’s the compromise.”

In an exclusive chat, Russ also told us that he feared for his life while watching the Ricky Hatton fight in Las Vegas – all thanks to his pal P Diddy getting a little carried away when Manny Pacquiao knocked out Ricky.

Russell, whose latest film is Get Him To The Greek, explained: “Ricky went down in a second and Puffy jumped on a chair.

“And there’s like 25,000 Mancs in that room and I’m stood next to a geezer jumping on a chair while Ricky was on the deck. I was self-conscious. Because Jay-Z’s here, Puffy’s on a chair, Ricky’s on the floor and 25,000 Mancs are just there. This is not a good look.

“I just tried to play it low-key. It’s difficult to do that under those ­circumstances. It’s made me go against boxing. Just slightly.”

Returning to the subject of his big day later this year, Russ adds that there is one person who won’t be getting an invite.

He says: “I think that David Cameron, his face looks like an egg that’s been painted by a child.” Russ, you really crack us up.

Source: Mirror