Jennifer Aniston and Justin Theroux may be a couple now, but Aniston's first impression of her future beau wasn't all that stellar. While promoting Wanderlust, in which they both star, on PopSugar, Aniston recalled that she first met the often-clad-in-black Theroux years before the film. "I thought, he's always so sweet, very nice," she says. But… "I remember thinking that's a very dark, you know, at first you think, 'Oh, he could be, like, a serial killer.' But the nicest person in the world."