It's about time that Nicky Hilton joined the family business. No, not the hotel empire, but rather the business of trading on her family's name and her personal notoriety for face time in front of a film or TV camera. Producers of the film ''National Lampoon's Pledge This!'', which stars Nicky's more ubiquitous sister Paris, announced on Tuesday that Nicky has also joined the cast, marking her big-screen acting debut. In the film, which one producer has described as '''Animal House' meets 'Revenge of the Nerds' with 'American Pie' humor,'' Paris plays a snooty president of an elite sorority that some misfit freshman girls want to pledge. It's not clear what role Nicky will play; producers mentioned her simply as one member of a cast that also includes former MTV personality Simon Rex, ''American Wedding'' alumna Alexis Thorpe, fellow celebrity younger sibling Randy Spelling, and ''Reno 911'''s Kerri Kenney.
The film begins shooting on Sept. 6, capping a busy month for Nicky Hilton. On August 15, of course, the 20-year-old made headlines with her late-night Las Vegas wedding to 33-year-old financier Todd Meister. On Tuesday, according to Fashion Wire Daily, she made another splash in Vegas, where she unveiled a line of ready-to-wear casuals she designed called ''CHICK.'' So at least she has something to fall back on in case she fails to earn a living as a movie actress.