10. Zooey Deschanel

Sci-Fi/Fantasy Roles: Trillian in The Hitchhiker’s Guide to the Galaxy
Has anyone ever looked quite so hot in a jumpsuit? Zooey Deschanel starred as the lovely Trillian in the 2005 Film Adaptation of The Hitchhiker’s Guide to the Galaxy, and from that moment on, she joined this super hot top 10 in the dreams and fantasies of men around the world.

9. Natalie Portman

Sci-Fi/Fantasy Roles: Padme Amidala in The Star Wars Trilogy

Women who are famous for quotes like “I’d rather be smart than a movie star” aren’t always the most attractive. But Natalie Portman is definitely an exception. This Israeli-American actress, who completed her undergrad at Harvard while filming Star Wars, is in our top ten because she’s smart and beautiful.

8. Tricia Helfer

Sci-Fi/Fantasy Roles: Number Six on Battlestar Galactica
Tricia Helfer got her start on Battlestar Galactica back in 2003, and she has been showing sci fi geeks her hot body ever since! Quickly becoming a fan favorite, Helfer played the role of Number 6 with grace, beauty and most importantly, sex appeal. When asked about her perfect man, Helfer replied, “I’ve never gone for the smooth, suave Latin or French lover. That usually makes me think they’re trying to pull one over on me. I lump Canada and the States together. I like good old North American boys.”

7. Raquel Welch

Sci-Fi/Fantasy Roles: Cora in Fantastic Voyage
Raquel Welch may be most well-known for her iconic, bikini-clad portrayal of early humanity in One Million Years B.C., but the movie that made her a star was the Fox hit, Fantastic Voyage. Welch plays an assistant to a team of doctors who are shrunk (you heard me correctly) in a submarine and placed in the blood stream of a famous doctor to get rid of a blood clot in his brain. It may sound like an episode of The Magic School Bus, but hey, it’s Science Fiction, right?

6. Summer Glau

Sci-Fi/Fantasy Roles: River Tam on Firefly, Serenity, Cameron in Terminator: The Sarah Connor Chronicles
In Firefly, Summer Glau played the highly intelligent, albeit creepy, government runaway River Tam. Glau brought an eerie, child like quality to the character, all the while remaining hot and kicking ass. When Firefly was canceled by Fox (big surprise) after only 11 episodes, fans worried when they’d see the lovely Miss Glau again. After reprising her role for the film Serenity, Glau went on to star as Cameron in Terminator: The Sarah Connor Chronicles, where she played a sexy assassin. Are you beginning to see a theme?

5. Jessica Alba

Sci-Fi/Fantasy Roles: Sue Storm in The Fantastic Four, Max Guevara in Dark Angel
If this was a list of the most talented actresses in Hollywood, then Jessica Alba might not be ranked quite so high. Unless of course her talent is getting out of a pool or wearing leather. However, this list is the hottest women of Sci-Fi and there she definitely qualifies. I can’t think of anything worse than Jessica Alba actually being an invisible woman, but she plays Sue Storm wonderfully. Her stint as Max on Dark Angel has become a cult classic over the years, playing one of the hottest super human/enhanced soldiers ever.

4. Carrie Fisher

Sci-Fi/Fantasy Roles: Princess Leia in The Star Wars Trilogy
Whenever you hear the words “hot” “sci-fi” and “women” together, most people think of at least one image. Carrie Fisher in a gold bikini laying provocatively against Jabba the Hut. Men have probably never been more jealous of a fat, disgusting slob than in that particular instance. The reason Carrie ranks so incredibly high on our list is the fact that that gold bikini has been the subject of men’s fantasies for over 40 years. That is some serious stay power. She might look a little rough around the edges now, but we can all remember the good old days.

3. Anna Paquin

Sci-Fi/Fantasy Roles: Sookie Stackhouse on True Blood, Rogue in X-Men
When Anna Paquin made her debut in ‘The Piano’ as a 9 year old child, the world didn’t quite know what she had in store for them. But boy did she grow up pretty. After successful roles in film, including her portrayal of Rogue in the X-Men films, Paquin took on her hottest fantasy role yet. Starring as Sookie Stackhouse, the human telepath on the hit HBO show True Blood, this hottie keeps audiences tuning in every week. Some hardcore Sci-Fi/Fantasy fans might claim True Blood is more horror, but if an abundance of Vampires, shape shifters, werewolves, fairies and telepaths doesn’t qualify for the fantasy category, I don’t know what does!

2. Megan Fox

Sci-Fi/Fantasy Roles: Mikaela in Transformers

Who would have ever thought that a role in a film about the popular 80s toy, would launch Megan Fox into Superstar status. Starring along side Shia LeBouf, in the mega blockbusters, Transformers and Transformers 2, Megan has become one of the sexiest stars around. Her looks may overshadow her acting but really, who cares? You aren’t watching films like Transformers to see Oscar contenders.

1. Kate Beckinsale

Sci-Fi/Fantasy Roles: Selene in Underworld
Women may know her for her roles in romantic comedies such as ‘Click’ or ‘Serendipity’, but guys know her for one reason: her role as the immortal Selene in Underworld. As the star of this universe where Lycans and Vampires are created through a mutated virus, Beckinsale manages to stay soft and beautiful while kicking some major ass. If it sounds too good to be true, it’s because this series might have overstayed it’s welcome. But that doesn’t make her any less hot.