The 52-year-old grinned in a selfie while Gunvalson stood behind her. "Well, well, well ......" Dubrow captioned the photo.
The two appeared to be in a restaurant, but it's not clear if the they were filming or just went on a girls night out together.
Last month, Dubrow appeared on E! News' Daily Pop and said that she would like to bring back some of the old cast from what fans consider to be "the golden years of RHOC." "I think what the audience wants is the fun. I mean, drama always happens but back in the day, it was drama like she broke the bow off my cake or something silly, you know," the That's Life alum said at the time.
"I’m definitely gonna start watching again if they bring back the OGs. I use to watch all the time with my mom and sisters❤️," one fan commented on the interview with Dubrow.
"I'm glad Heather is coming back ❤️," another wrote.
When fans had questions about where Dubrow stood with Gunvalson and Tamra Judge, she took to her Instagram Story on July 26 and said that she loves both of them very much. "I would love for them to come back in some capacity. I think it would be absolutely fantastic! So yeah, send in your requests for all of that," she told fans at the time, per Heavy.
Dubrow began her RHOC journey in the seventh season and remained on the show until season 11. She signed on to return for season 16, which recently began production. Meanwhile, the 59-year-old exited the reality show in season 13.
Fans can also expect to see some new faces with Dr. Jen Armstrong, Noella Bergener and Nicole James slated to join the cast.