Can you believe Sigourney Weaver is turning 60? On October 8, the star of "Alien," "Ghostbusters" and other classics, hits the big 6-0, looking as regal and gorgeous as ever.

Forget Meryl Streep -- for guys, Sigourney Weaver is hands down the greatest actress of our generation. After all, she's tackled everything from sci-fi to highbrow indie fare ("The Ice Storm"), and held her own opposite the likes of Bill Murray and Harrison Ford. She even scored an Oscar nom for acting with dudes in gorilla suits. Let's see Megan Fox do that.

Now, with a role in James Cameron's upcoming "Avatar," Sigourney is back in the genre we love her best in. Here's a look at the many memorable, and crush-worthy, roles of Asylum's favorite actress.

"Alien" (1979)
Ridley Scott's sci-fi classic is where most budding geeks first developed a crush on Sigourney. Her gun-toting alien killer Ripley forever changed the motion-picture landscape, (there's a reason she's routinely voted sci-fi's biggest badass), ushering in the era of the modern action heroine. Scratch that, Ripley's one of the greatest movie heroes ever. (And she looks great stripped down to nothing but an undershirt and panties.) Without Ripley, there would be no Angelina Jolie as Lara Croft and no Milla Jovovich as whoever she plays in "Resident Evil."
"Ghostbusters" (1984)
Weaver's Dana Barrett provided a much needed dose of estrogen to the "Ghostbusters" boys club, keeping Venkman on his toes as the paranormal investigators' first (and sexiest) client. Her transformation into Zuul, complete with skimpy red dress and levitating-four-feet-above-the-covers ability, puts us in the uncomfortable position of being attracted to a demonic dog. But, boy, we'd be Dana's "Key Master" any day. And, by that, we mean we'd help her prepare for the coming of Gozer.
"Aliens" (1986)
Ripley returned in Sigourney's first pairing with filmmaker James Cameron, who added new layers to the popular character. Now, not only was Ripley tough, she was tougher than a whole unit of space Marines. But she also had a caring, motherly side, and a mouth to rival any tough-talking sailor. ("Get away from her, you b*tch!" is right up there with "Hasta la vista, baby" in terms of classic sci-fi movie kiss-offs.)
"Working Girl" (1988)
Sure, you're supposed to root for Melanie Griffith's baby-voiced heroine. But Weaver's duplicitous, high-powered exec, all '80s shoulder pads and cutting remarks, is the real star of the movie. (Sigourney scored an Oscar nomination for the role.) We're still not sure why Harrison Ford chooses boring Tess over Sigourney's Katherine Parker. Come on, Katherine went skiing in Europe so much, she was on a first-name basis with the chalet owner. Girlfriend was sexy and loaded.
"Gorillas in the Mist" (1988)
We have vague memories of watching this boring movie with our parents and wondering why Dana Barrett was hanging out with apes. (Yeah, yeah, it's acclaimed and all. But we were 10 and it wasn't "Alien" or "Ghostbusters." What do you want?) Weaver was on a roll that year, scoring nods for Best Actress for "Gorillas" and Best Supporting Actress for "Working Girl" at the 1989 Academy Awards. (She lost to Jodie Foster and Geena Davis, respectively. Can we retroactively give Geena's Oscar to Sigourney?)
"Ghostbusters II" (1989)
Weaver returned for the eagerly awaited "Ghostbusters" sequel, with Dana Barrett now a mother who works with creepy Janosz at the art museum. Her chemistry with Bill Murray remains, even though the sequel suffered from a serious lack of Walter Peck. Hopefully Dana Barrett will pop up in the upcoming third "'Busters" outing. Otherwise, who will Venkman banter with? Winston?
"Dave" (1993)
Sigourney and director Ivan Reitman teamed up for the third time for this high-concept comedy from the days when high-concept comedies were actually good. She's highly convincing as first lady Ellen Mitchell (Sigourney should play the first lady in ever movie), and her relationship with fake president Kevin Kline is far less depressing than in ...
"The Ice Storm" (1997)
Sigourney gives one of her best performances as an aging "key party" enthusiast in Ang Lee's tribute to swinging '70s suburbanites. Sure, the sex is more depressing than titillating, but Sigourney looks great as she enters her late-period "mom" phase. Though when Sigourney plays a mom, she's definitely not June Cleaver.
"Galaxy Quest" (1999)
Weaver strapped on a blonde wig and push-up bra to play Computer Officer Gwen Demarco in this underrated "Star Trek" spoof. Her parody of sci-fi bimbos is spot on, and only serves to reinforce what a game-changer Ripley was. If you've ever wondered what Sigourney Weaver would look like as a tarted-up blonde, Netflix this one immediately.
"Tadpole" (2002)
Who better to play the object of a misguided teenage boy's affections? (We'll look past the fact she was the kid's stepmom.) Sigourney's role in this acclaimed indie comedy defined cougar way before that term became tiresomely played out.

Though we feel like we've thoroughly mined the Weaver oeuvre, did we miss any of your favorite points in this badass lady's career? Let us know in the comments