Transformers beauty Megan Fox is officially the queen of science fiction after fans voted her best sci-fi actress at the Spike TV Scream 2009 festival.

The star-studded event, held on Saturday at the Greek Theatre in Los Angeles, pays tribute to the best in sci-fi, horror, fantasy and comic-inspired films and TV shows.

Fox received her prize for her role in summer blockbuster Transformers: Revenge of the Fallen, with the film also scooping an award for its special effects and Isabel Lucas receiving a breakout performance trophy for her role as a seductive, shape-shifting robot.

Vampire movie Twilight scored four awards - best fantasy film, breakout performance for Taylor Lautner and best fantasy actors for stars Robert Pattinson and Kristen Stewart .

Bloodsuckers proved popular at the ceremony, with hit TV show True Blood landing four trophies for best TV show, best villain, and best horror actor and actress for Stephen Moyer and Anna Paquin.

Stars including Tobey Maguire, Jessica Alba, Kate Bosworth, Harrison Ford, Justin Long and Christina Ricci were on hand to present the prizes.

Pirates of the Caribbean actor Johnny Depp presented his on-screen father, Rolling Stones rocker Keith Richards with the Rock Immortal award.

On accepting the award, Richards commented, "I liked the living legend, that was all right, but immortal is even better."