02/21/2013 12:36 pm ET Updated Feb 21, 2013

'Real Housewives Of Beverly Hills' Cast Shakeup? Season 4 Could Look Different

"The Real Housewives of Beverly Hills" is heading for a cast shakeup, according to Radar reports only Lisa Vanderpump and Brandi Glanville are guaranteed to return for Season 4.

According to TMZ, Adrienne Maloof has told producers she does not want to return for a new season. Perez Hilton reports Taylor Armstrong is also likely leaving the reality show.

A source told Radar that Kim and Kyle Richards are on the chopping block and new addition Yolanda Foster "was brought in as a super-rich trophy wife, but she’s just been so boring to watch and doesn't add anything to the dynamic of the group." Except lemons.

However, a source close to the series told HuffPost TV that no cast for a new season has been decided.

Meanwhile, rumors are flying about who will join the cast. TMZ reports former "Extra" host Dayna Devon could join the group. Radar quotes a source as saying producers are looking at Lionel Richie‘s wife Brenda and Sylvester Stallone‘s wife Jennifer to join the series.

Bravo has yet to announce a fourth season of "Real Housewives of Beverly Hills" and had no comment on the casting rumors.

Real Housewives of Beverly Hills