When Vanderpump Rules premiered, its original premise was centered around a group of friends with entertainment aspirations who all worked at the same restaurant. Throughout the years, the cast members have become professional reality stars and no longer "need" to pursue acting or music. Before reality TV stardom, though, Vanderpump Rules stars appeared in TV shows and movies aside from the show that made them famous. It's pretty ironic that a show that started out with almost every cast member wanting to be a model or actor ended up creating stars who are very well-known just for being themselves.
Considering that Vanderpump Rules is a spinoff of Lisa Vanderpump's other TV show, The Real Housewives of Beverly Hills, it would be expected that most of the cast members have showed up in the background at Lisa's dinner parties and other events as servers and bartenders, but RHOBH isn't the only show on their resumes.
Vanderpump Rules stars appeared in major movies, popular reality TV shows, scripted shows, and music videos before Bravo viewers got to know them as waiters and bartenders at SUR. A lot of these are shows and movies that Vanderpump Rules fans have probably seen, but either they didn't know the Pump Rules cast members at the time or the cast members weren't front and center in the lead role.