According to Totalscifionline.com, Sigourney Weaver's role pipped Sarah Michelle Gellar's lead character in the hit TV show Buffy The Vampire Slayer in the sci-fi film list.

Image: Sarah Michelle Gellar

Katee Sackhoff's Starbuck in Battlestar Galactica bagged the third spot, reports Contactmusic.

Image: Katee Sackhoff

Gillian Anderson's Dana Scully in The X-Files came in fourth.
Image: Gillian Anderson

Linda Hamilton's Sarah Connor in Terminator rounds up the top five. Here is the full list of the top sci-fi woman of all time.

1. Ellen Ripley (Sigourney Weaver, Alien)

2. Buffy (Sarah Michelle Gellar, Buffy The Vampire Slayer)

3. Starbuck (Katee Sackhoff, Battlestar Galactica)

4. Dana Scully (Gillian Anderson, The X-Files)

5. Sarah Connor (Linda Hamilton, Terminator)

6. Princess Leia Organa (Carrie Fisher, Star Wars trilogy)

7. Rose Tyler (Billie Piper, Doctor Who),

8. Sam Carter (Amanda Tapping, Stargate SG-1)

9. Nyota Uhura (Nichelle Nichols, Star Trek)

10. Leeloo (Milla Jovovich, The Fifth Element).

Image: Linda Hamilton in a scene from Terminator: Resurrection