Simon Cowell turned down a $2 million offer to be the face of Viagra.

The music mogul, 48, said he was "insulted" when he was asked to advertise the drug, which helps impotent men have a fulfilling sex life.

He said: "Last year, my agent rang me and said, 'You've been offered an incredibly big deal. It's to be the face of Viagra.' "And I just said, 'Sorry, but that has to be a f***ing insult.'"

Although Simon doesn't need any help in the bedroom, he has admitted to seeking help to stay looking young.

The 'X Factor' judge has confessed he has regular Botox injections to smooth out any wrinkles.

He said: "To me, Botox is no more unusual than toothpaste. It works, you do it once a year - who cares."

"But I'd never dye my hair, although I know everyone thinks I do!" Cowell also took a swipe at the current crop of Hollywood stars, saying the actresses are no longer sexy.

He added to Britain's Glamour magazine: "Nicole Kidman and Kate Bosworth - they're just nothing. There's nothing to fancy or fantasize about there."

"I like old school glamour, Raquel Welch and Brigitte Bardot, voluptuous and naughty. Mistresses!"

"But I do like the girl, Carla Bruni, who's just got married to the French President. That girl has got a very, very sexy face - it's naughty."