Sigourney Weaver a six-foot-tall cinematic empress with three Academy Award nominations and a host of classic film credits under her belt. Better yet, everyone can agree upon her immense gifts as an actress. If you don't care for sci-fi, you can skip her Ridley Scott works and adore her comic turns. IfMelanie Griffith's addiction to shoulder pads isn't your thing, you can skip move right along to Sigourney's starring roles in '90s thrillers. She's been in everything, she can do everything, and now on her 63rd birthday, let's count down what she's done best. Here are her 10 fierecest moments.

10. Sigourney scorches Indonesia in The Year of Living Dangerously

In the grand scheme of exotic Oscar-winning '80s cinema, The Year of Living Dangerously is an under-discussed gem. Though tiny supporting actress Linda Hunt steals the show as male dwarf photographer Billy Kwan, Sigourney is an absolute vision throughout the movie. And thank God: She is gorgeous and deserves glamorous roles, dammit! Her character isn't especially developed enough (or even consistently accented), but as British Embassy officer Jilly Bryant, Sigourney is as mesmerizing and cool as Isak Dinesen wishes she was in Out of Africa.

9. The poachers just want a piece of that kickass braid in Gorillas in the Mist

Dian Fossey may have met her untimely end in Rwanda, but Sigourney's Oscar-nommed turn as the legendary National Geographic researcher is a pretty stark portrayal. Who else could play such a dogged and ultimately delirious woman? And better yet: Who could pull off that flawless rope-width braid?

8. Heartbreakers

Everyone's choice for the greatest Gene Hackman film or Anne Bancroft film, Heartbreakers, is basically what you'd get if The Grifters had a sense of humor and ruled. A mother-daughter con-artist team run romantic scams on men, and the point is, Sigourney Weaver is given the opportunity to play dominatrix, dismiss dudes, and even trill a Russian-accented version of "Back in the U.S.S.R." at one point. Her nuttiest quote: "So much loudness. Can we not go somewhere I can relate to you... orally"? Perfection. She out-hots Jennifer Love Hewitt easily.

7. Hi, Copycat is terrifying

Copycat is the definition of a movie you accidentally start watching on TV as a lark, but you find yourself terrified and glued as the minutes pass. As agoraphobic serial killer expert Helen Hudson, Sigourney gives a thoroughly convincing performance aided by Holly Hunter in a fabulous turn as detective M.J. Monahan. Weaver's terror is so palpable throughout the movie, it makes the scary characters (like Harry Connick Jr. as onetime killer Daryll Lee Cullum) even more real.

6. Galaxy Quest is that rare comedy that's legitimately cool and nerdy

As former sci-fi star Gwen DeMarco who is resigned to a life of conventions and autograph signings, Sigourney is just lovable in Galaxy Quest, one of the few cheeky sci-fi comedies of 10-15 years ago that actually worked. Mars Attacks? Shut up. Evolution? Negative. In this one-of-a-kind jam, the luminous Sigourney is plenty more magnetic than Tim Allen, even though he's giving his finest performance to date.

5. Sigourney is threateningly hot in drag.

This 1983 portrait's chicness and swagger speak for themselves, but I'd like to point out how weird it is that in drag, Sigourney resembles her Ghostbusters II costar Peter MacNicol. Seriously, she's about one audition away from a serious Ally McBeal arc.

4. Alien's extraterrestrial underwear moment.

It'd have been memorable enough if Sigourney just throttled some Xenomorph ass in Ridley Scott's 1979 masterpiece, but before that critical moment (and amongst a slew of sexual imagery), she strips down to her skivvies for one weirdly sexualized moment. Sigourney may have complained that Meryl Streep took all her roles in college, but this was an early role that belonged only to Ms. Weaver.

3. "No Dana... only glamor!" in Ghostbusters

Ghostbusters has exactly zero effective imitators, and I think part of the reason it remains such a comic anomaly is the chemistry between Bill Murray and Sigourney. That is one snide, bemused couple, am I right? Thankfully Sigourney wins a chance to be uninhibited and caftan-adorned when Zuul takes over her body during one of the movie's best scenes. If she's the gatekeeper, I better be on the guest list.

2. She rules in Working Girl because she is, after all, Sigourney.

Katherine Parker: Not exactly the friendliest boss that Tess McGill (Melanie Griffith) could score, but hey, at least she can rock a vermilion blazer like a 1988 superhero. As the fearsome and unscrupulous higher-up, Sigourney gets to utter some phenomenally callous lines. The best: "I am, after all, me" and "Why that little... sl*t! That goddamn little... b*tch! Secretary!"

1. Get away from her, you b*tch! Sigourney deserves beatification thanks toAliens alone.

Hard to believe a sci-fi film from '86 could hold up so well, but it honestly feels like Aliens' special effects are eons ahead of its time. Naturally my favorite moment is when Sigourney approaches the slimy-ass adversary and implores, "Get away from her [Newt, her tiny pal], you b*tch!" Remember when James Cameron knew how to write a screenplay? Those were the days. This is an expertly written movie with one fabulous protagonist, and no one else could've imbued Ellen Ripley with as much soul and tenacity as Sigourney. Bow down, all.