20. Monica Bellucci

Sci-Fi/Fantasy Roles: Persephone in The Matrix Reloaded

If you combine an Italian super model and a science fiction film, you are bound to have an explosive box office. With the addition of Monica Bellucci, The Matrix saw its highest grossing film of the series, making over $742 Million world wide. Playing the unhappy wife in ‘Matrix Reloaded’ boosted Monica’s career, and now you can catch her in her upcoming film, ‘The Sorcerer’s Apprentice’!

19. Rose Byrne

Sci-Fi/Fantasy Role: Cassie in Sunshine

Rose Byrne was cast in Sunshine after Danny Boyle saw her in Troy. Well, I guess “thanks” are in order to Mr. Boyle. Byrne’s portrayal of the emotional, loving pilot in Sunshine not only make the movie worth it, but it makes you realize smart girls might just be hotter!

18. Kris Williams

Sci-Fi/Fantasy Roles: Self on Ghosthunters

This New England hottie can install carpet for you, help your order a handgun or track down your Paranormal activity. For the past few years, Kris Williams or “Bait” has been researching the paranormal activity around the US and even a special assignment in Ireland. Not only is she bad-ass she doesn’t scare easily.

17. Scarlett Johansson

Sci-Fi/Fantasy Roles: Jordan two Delta in The Island

She’s blonde, curvy, and has the lips of an angel. If you put Scarlett Johannson in a commerical for the SyFy channel, she’d be likely to make this list. However, her portrayal of Jordan Two Delta in 2005′s, The Island only adds to her sci-fi beauty! Starring as the clone Jordan Two Delta, Johannson brings the ass kicking/independent women role to a whole new level. While the thought of clones can sometimes be intimidating, would the world be such a bad place with a few extra Scar Jo’s running around?

16. Emma Watson

Sci-Fi/Fantasy Role: Hermione in Harry Potter

When Emma Watson began starring as Hermione Granger in the Harry Potter films, she was only 9 years old. By the third film in the series, she had become an object of affection for geeky teenage boys around the world. With her beautiful smile and rocking body, this young actress is sure to have a huge career ahead of her. She might not be kicking ass on screen phsycially, but if it’s a mental battle, Emma has your back! Brains and beauty? What a dangerous combination!

15. Milla Jovovich

Sci-Fi/Fantasy Roles: Leeloo in The Fifth Element
With her jaw dropping attire in The Fifth Element, Milla Jovovich gave sci-fi nerds everywhere something to drool over. Jovovich made our list because of her stunning beauty and her smoking hot body. Milla also gets an honorable mention for her leading role in Resident Evil. With her movie and designing careers, we’re not sure how she does it but we hope that she continues to do it!

14. Charlize Theron

Sci-Fi/Fantasy Roles: Aeon Flux in Aeon Flux

With a broad resume and a ton of acting talent, Charlize Theron certainly deserves a place on our list. In Aeon Flux, Charlize plays the title character, who is an assassin clone sent to kill the leader of a group of scientists. This action packed film, which was released in 2005, didn’t receive great reviews, and made 10 million less than it’s $62 Million budget, but it starred Charlize in a skin tight jumpsuit, so it was well worth the 2 hours!

13. Zoe Saldana

Sci-Fi/Fantasy Role: Uhura in Star Trek

Zoe Saldana has come a long way from dancing her way through films like ‘Drumline’ and ‘Center Stage’. After starring in block buster hits such as Pirates of the Carribbean 3 and Vantage Point, landed the role of Uhura. Giving Uhura a sexy edge she didn’t have before, Saldana became one of Hollywood’s hottest “it” girls. You can see her next in James Cameron’s ‘Avatar’.

12. Grace Park

Sci-Fi/Fantasy Roles: Number 8: Battlestar Galactica

This Canadian actress is best known for her sci-fi role, Number Eight on Battlestar Galactica. Although her character might not be as crucial as hottie Tricia Helfer, the show wouldn’t be the same with out this beauty! If you’re missing your Grace “fix”, be sure to check her out on CBS’s, The Border.

11. Halle Berry

Sci-Fi/Fantasy Roles: Storm in X-Men

Halle Berry has come a long way from competing in beauty pageants in Cleveland, Ohio. This beauty has made her mark in so many films, it’s hard to choose which role truly defines her as a Sci-Fi/Fantasy hottie. But after hours of careful selection, Halle as Storm took the cake.

Click here for the Hottest Women of Sci-fi/Fantasy 10-1