'Why can't I talk about sex?'

Transformers star Megan Fox struggles to keep her mouth shut in a new interview with GQ magazine.[Agencies]

Megan Fox has vowed never to stop talking about her sex life.

The Transformers: Revenge of the Fallen star insists she is not embarrassed to reveal her bedroom antics to the world.

She said: "Sex is something that everyone does, so why can’t I talk about it?"

Megan also revealed she is keen to star in a variety of different movie genres which showcase her versatility, because she doesn’t feel the two ‘Transformers’ movies challenged her as an artist.

The 22-year-old beauty - who is engaged to actor Brian Austin Green - said: "I’ve done one big movie so far with Transformers. And it’s not a movie I want to stand on as far as acting ability goes.

"I mean - I'm not going to win an Oscar anytime soon. I’m not Meryl Streep."

In the frank interview with America’s GQ magazine, Megan added that regardless of her career choices, she finds it hard to cope with her nerves and has to rely on anti-anxiety medication.

She said: "Before I go onstage anywhere, I take a Xanax now."