NUMBER 4: CARRIE FISHER

NUMBER 6: CARRIE FISHER

Carrie Fisher tied with Portman and Weaver in the fourth place for the unforgettable role of Princess Leia in Star Wars in a poll for the sexiest sci-fi babe. MSN Movies fans voted in the poll, which threw up six beautiful women in its wake.
IN THIS PICTURE: Chewbacca, the eight-foot tall, 200 year-old "wookie" character from Star Wars, gives his acceptance speech in his own tongue June 7 upon receiving the MTV Movie Awards Lifetime Achievement from Carrie Fisher (Left), who played Princess Leia Organa in the same movie.

NUMBER 4: SIGOURNEY WEAVER

NUMBER 5: SIGOURNEY WEAVER

Also tying in the fourth place was Sigourney Weaver for her strong and captivating role in Ridley Scott's film, Alien.
IN THIS PICTURE: Actress Sigourney Weaver introduces Alien to the open-air crowd on the Jemaa el Fna square in Marrakesh November 16, 2008. The Marrakesh 8th International film Festival paid a tribute to Weaver.

NUMBER 4: NATALIE PORTMAN

Science fiction and fantasy films have always benefited from engaging female characters and Natalie Portman proved that by grabbing the number fourth spot for her performance in Star Wars.
IN THIS PICTURE: Natalie Portman arrives before the world premiere screening of the film Indiana Jones and the Kingdom of the Crystal Skull directed by Steven Spielberg at the 61st Cannes Film Festival May 18, 2008.

NUMBER 3: MILLA JOVOVICH

The calibre of the runners-up was very high too convincing supermodel-turned-actress Milla Jovovich that she was in good company. She bagged the number three slot for her role in The Fifth Element.
IN THIS PICTURE: Actress Milla Jovovich poses on the red carpet before the screening of the film The Palermo Shooting at the 61st Cannes Film Festival May 24, 2008.

NUMBER 2: HALLE BERRY

Oscar winning actress Halle Berry came a close second as mutant weather-controller Storm in the X-Men franchise.
IN THIS PICTURE: Actress Halle Berry at the premiere of X-Men.

NUMBER 1: MEGAN FOX

Megan Fox has been named the sexiest sci-fi babe of all time. The Transformers star topped the poll, beating many sizzling stars to the No 1 spot. Editor of SFX magazine, David Bradley, said: "There's no denying Megan Fox is a compelling choice for a new generation of sci-fi fans! She sizzled on screen in The Transformers."
IN THIS PICTURE: Actress Megan Fox poses at the 13th annual GQ magazine's "Men of the Year" party in Los Angeles November 18, 2008.