Fox Wasn't Khan's First Choice For Eminem Promo

The Transformers beauty stars alongside Dominic Monaghan to portray Eminem and his ex-wife Kim Mathers during their tumultuous and violent relationship.

Khan admits Fox wasn't his immediate casting choice - but he later decided to approach the actress about the part in the Rihanna collaboration and was amazed when the self-confessed Eminem fan accepted.

He tells MTV News, "We were actually looking around for some other actresses, and then, midway through, I just thought, 'Why don't I just try this?' I mean, I have the biggest artist in the world, with the hottest song on the planet, with the hottest female artist... and it's a meaty role. It's not like you're just slipping in there and looking pretty.

"She said 'yes'. I was blown away."

In contrast, Khan had Lost star Monaghan in mind to play Eminem from the start: "I wanted him because he's an actor who can bury himself (in his roles). You can do anything with him, and essentially, he's a villain through all of (the video), and I think he did a great job."