Rosie Huntington-Whiteley wowed the crowds at the London premiere of 'Transformers 3: Dark of the Moon' last night (26.06.11).

The Victoria's Secret model - who makes her film debut in the Michael Bay directed movie after taking on the lead female role from Megan Fox - looked stunning in a backless midnight blue Burberry dress and admitted she was shocked when she found out she got the part.

Rosie - who stars alongside Shia LaBeouf in the movie - said: "I never thought I would get to act. You never know what the future's going to bring."

Rosie was joined on the red carpet at London's BFI IMAX by director Michael, 'Golden Compass' star Dakota Blue Richards and fashion designer Christopher Kane.

While it was Rosie's first film, the 24-year-old beauty managed to impress co-star Shia with her acting skills and screen presence.

He has said: "Mike films women in a way that appeals to a 16-year-old sexuality. It's summer. It's Michael's style.

"And I think Megan never got comfortable with it. This is a girl who was taken from complete obscurity and placed in a sex-driven role in front of the whole world and told she was the sexiest woman In America. And she had a hard time accepting it.

"When Mike would ask her to do specific things there was no time for fluffy talk. We're on the run. And the one thing Mike lacks is tact.

"Rosie comes with this Victoria's Secret background, and she's comfortable with it, so she can get down with Mike's way of working and it makes the whole set vibe very different."