Rumer Willis was born to be an actress

When you're the daughter of a couple of the sexiest screen stars of their generation, going into the family business is a no-brainer.

"My earliest memories were from movie sets," says Rumer Willis, daughter of Bruce, and a young woman who has the same raspy voice as her mom, Demi Moore. "I got to see my parents doing that work every day, and I couldn't think of a more fun job to have, a more fun career to pursue."

It hasn't hurt that she was one of People Magazine's "most beautiful people" in 2008 and landed a spokesmodel job with Ocean Pacific last year.

A tabloid favorite since birth (named for the writer Rumer Godden), she celebrated her 21st birthday in August in Vegas, with parents and step-parents (Ashton Kutcher and Emma Heming). And she is in the horror film "Sorority Row." It's Hollywood royalty's version of paying one's dues. So was her last film, "The House Bunny," and so is her recurring role on TV's new "90210."

"I don't think I realized until I started working myself what it was that I'd been privileged to see, growing up," Willis says. "I saw two actors who were in a place that I would want to be, someday, at the top of their profession. When I started acting, I had to realize that they were at a different level than me and that the roles would be smaller, that I'd have to work my way toward what they have. It was a conscious decision on my part to try and do this on my own."

So while she still lets Mom and Dad read her scripts or listen to her audition, she's determined to "make it by myself." Besides, she's the one who's actually in the demographic for sorority horror films.

"Scared sorority girls are just funny, right?" she says with a laugh. "I love the fact that this movie is female-driven and character-driven, not a horror movie that just has people you don't know dying, one after the other. This is about these girls facing the consequences of their actions (a practical joke turns deadly, and the dead return for revenge, apparently), how we try to cope, emotionally and physically, with this horrible thing. It's pretty funny, too."

She's film-savvy enough to know that roles in such movies have "functions," and she knows where her character, Ellie, fits in.

"Somebody's got to play the girl who can't handle this situation at all. That's Ellie. She's the one overwhelmed by all this.

"But I'm perfect for that. I barely got through 'The Ring' the one time I tried to watch it. It's not blood that gets me. It's the stuff we can't see that freaks me out."