Vanderpump Rules season 4 hasn't yet been announced, but last night, a major hint surfaced on the red carpet.

Did Lisa Vanderpump Fire Stassi Schroeder From 'Vanderpump Rules?'

During OK! Magazine's So Sexy party in New York City, several members of the Vanderpump Rules cast were in attendance, including Scheana Marie, Jax Taylor, Ariana Madix, Tom Sandoval, Katie Maloney and Kristen Doute.

While this doesn't necessarily mean the cast members mentioned are all returning, but considering the NBC Upfront is taking place today in New York City, it certainly gives fans reason to believe that may be the case.

Kristen Doute Is Back At SUR Lounge, Is She Filming 'Vanderpump Rules?'

Just yesterday, TMZ reported news of Stassi Schroeder's exit from the show, claiming her former boss at SUR Lounge, Lisa Vanderpump, had grown tired of her bad behavior.

Aside from Schroeder, no other cast members have been fired.