Strutting Her Stuff: Natasha Henstridge in Species (1995) and Species 2 (1998)
The Hotness: A fusion of human and alien DNA, whose boffin creators consider to be a botched experiment.
Not that you'd know it to look at her. Amazing strength and stamina, a libido off the scale, and a bod to die for. Literally.
Possible Relationship Issues: her breeding instinct is hell-bent on creating a humanity-destroying alien army.
So wear a condom.
Richard B. Riddick
Strutting His Stuff: Vin Diesel in Pitch Black (2000) and The Chronicles of Riddick (2004).
The Hotness: Riddick's a Furyan, a post-Earth offshoot of the human race that's stronger, tougher and more bad-ass than anybody else.
Riddick also has one very useful skill for the bedroom: he can see in the dark.
Possible Relationship Issues: He carries a wave of energy - the Wrath of the Furyans - that apparently carries "the anger of his entire race."
He's a moody sort at the best of times, so try not to upset him, eh?
Strutting Her Stuff: Kim Basinger in My Stepmother is an Alien (1988)
The Hotness: Aside from the model looks, you mean?
She’s a complete amateur when it comes to humanity, so you can pretty much create your dream woman.
Possible Relationship Issues: Bad habits galore.
For starters, Celeste’s habit of cigarette-chewing is going to make you think twice about getting some tongue action.
Thomas Jerome Newton
Strutting His Stuff: David Bowie in The Man Who Fell to Earth (1975).
The Hotness: Engimatic, ethereal, inspirational. With his eye for fashion and messianic cool, Newton is the alien as rock star.
Plus, he's independently wealthy as a result of being able to patent all that alien tech.
Possible Relationship Issues: He's come all this way and what does he want to do? Sit around all day and watch daytime telly with a bottle of booze in his hand.
It's not exactly a rare character type round here, you know.
Princess Leia Organa
Strutting Her Stuff: Carrie Fisher in Star Wars Episodes IV to VI (1977, 1980, 1983)
The Hotness: Born a Jedi, raised as royalty, Leia’s got the nature and nurture sorted.
She's sharp-tongued, a dab hand with a laser gun and likes dressing up. Susceptible to rogues, so she likes a bit of rough, too.
Possible Relationship Issues: Don’t mistake the bondage gear for a sign of submission.
This gal’s a freedom fighter, so she's hardly going to take things (ahem) lying down.
Strutting His Stuff: Harrison Ford in Star Wars Episodes IV to VI (1977,1980, 1983).
The Hotness: A scruffy-looking scoundrel with moves to match: he can do the Kessel Run in less than 12 parsecs.
And although he has the look of a guy who will bolt from trouble at the first opportunity, deep down he's honourable to come back fighting.
Possible Relationship Issues: His complete inability to respond in kind to the phrase "I love you."
Glibly replying "I know" is a one-way street to relationship counselling.
Strutting Her Stuff: Lisa Marie in Mars Attacks! (1996)
The Hotness: A slinky vision of alien sex-appeal, this unnamed assassin is all curves and beehive.
Which suggests those Martians appreciate feminine beauty as much as the next guy. Ack-ack-ack.
Possible Relationship Issues: You chat her up, you take her out, she gives absolutely nothing back...until she bites your finger off.
Plus, she won't stop chewing gum. Bad habit.
Strutting His Stuff: Keanu Reeves in The Day The Earth Stood Still (2008).
The Hotness: An all-powerful alien messenger with the God-like say-so to destroy us all, or at least teach us a lesson about respecting the planet.
Lesson 1: Given the choice of how to appear to humanity, Kaatu's decided to wear Keanu Reeves like a suit. Clearly, this guy knows his shit.
Possible Relationship Issues: Don't suggest a double-date.
His best mate, Gort, is a trigger-happy robot that can transform into a swarm of ultra-destructive nanites.
Strutting Her Stuff: Milla Jovovich in The Fifth Element (1997)
The Hotness: As the eponymous Fifth Element, Leeloo is humanity’s last stand against an extra-terrestrial Great Evil. Dressed in nothing but bandages.
Although she sure talks funny, it’s not 100% she’s alien. But with that combo of supreme power and clothes aversion, we’re prepared to take that chance.
Possible Relationship Issues: Her best mates include Earth, Wind and Fire, which suggests a non-stop disco soundtrack.
We'd rather hang out with Ruby Rhod.
Strutting His Stuff: Sam Rockwell in The Hitch-hiker's Guide to the Galaxy (2005).
The Hotness: A renowned hellraiser, life is surely never dull, with his fondness for testing the Infinite Improbability Drive.
And then there's the matter of a guy with two heads and three arms. Just saying.
Possible Relationship Issues: His drinking habit. Specifically, drinking Pan Galactic Gargle Blasters.
Which, as everybody knows, is like having your brain smashed out by a slice of lemon wrapped round a large gold brick. Ouch.