Megan Fox has said admitted she is a bisexual – a revelation which could come as a welcome surprise to her boyfriend Brian Austin Green.

The Transformers actress said there was “no question in my mind” about her sexuality in a new magazine interview.

But despite enjoying the attention of both men and women, Megan added that her bisexuality had some clear ground rules.

“I’m also a hypocrite: I would never date a girl who was bisexual, because that means they also sleep with men, and men are so dirty that I’d never want to sleep with a girl who had slept with a man,” she said.

Megan joins a growing list of Hollywood stars, including Angelina Jolie and Lindsay Lohan, who have outed themselves as a bisexual.

In the interview with Esquire, the actress also launched an angry tirade against movie bosses who think she’s too good looking to appear in their film.

“It p*sses me when people f*cking complain that I’m too beautiful to get a part. That’s bullsh*t.’

“If I weren’t attractive I wouldn’t be working at all.”

The 22-year-old actress also claimed in the interview that her sexual confidence was completely natural.

The actress said she didn’t have to “turn on” the ability because it was “just there”.