Will Vanderpump Rules season four include a new star?

Is Kristina Kelly A Part Of 'Vanderpump Rules' Season Four?

Earlier this year, Jax Taylor began dating Brittany Cartwright, and now, fans are wondering if she'll be seen on the upcoming installment of the Bravo reality show. Although an official announcement won't be made until later this year, Cartwright's Instagram feed appears to offer a major hint.

"Fireball & baby pics for Ariana's funnest (we hope!) birthday ever!! @ariana252525 thanks for having me, today was sooooo fun!!! #HappyBirthday beautiful," Cartwright wrote on Friday night, along with a photo of herself and Vanderpump Rules cast member Ariana Madix.

Vail Bloom Won't Appear On 'Vanderpump Rules' Season Four

Cartwright also hung with Scheana Marie, who is also a full-time cast member on Vanderpump Rules.

In addition to her participation in Madix's birthday, Cartwright has also been seen with Kristen Doute, the third female cast member of the show, which only further hints that she may have at least a guest role on season four.

"Fun times last night!! So glad I finally met you @kristendoute ! #elevatorselfies #LA," Cartwright captioned a photo of herself and Doute last week on Instagram.

News of Cartwright's possible addition to the show comes after Stassi Schroeder and Vail Bloom's exits from the series.

Vanderpump Rules season four is expected to premiere this fall on Bravo.