Kyle Richards and the cast of The Real Housewives of Beverly Hills may still be in production on season seven.

Kyle Richards Offers Update On Kim Richards After She's Spotted With Brandi!

Although it was previously believed that filming had wrapped weeks ago, a new message from the mother of four seems to hint at otherwise.

"Off on a secret mission ... #rhobh," Richards wrote on Instagram on Thursday.

Guess Which Former 'RHOBH' Star Is Returning To The Show For Season Six?

During the upcoming sixth season, fans will watch as Yolanda Foster's Lyme disease is questioned, much like the cancer of Brooks Ayers during The Real Housewives of Orange County season 10.

"I think for a lot of people it's very confusing," Richards told Entertainment Tonight ealier this month. "A lot of the things [Foster]'s gone through and the treatments she's done, for some of the cast members they were questioning exactly what she was doing and exactly how sick she was. It was not a good situation."

"Some things came up made some of the Housewives question exactly what was really going on," Richards added.

Also during season six, fans will see the return of Richards' older sister, Kim, as well as the return of Brandi Glanville, both of whom were believed to have been fired after season five.

For more Kyle Richards, tune into The Real Housewives of Beverly Hills season six, premiering on Bravo on Tuesday, Dec. 1, at 9 p.m., and check out the sneak peek below.

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