It's official, Lisa Vanderpump will be joining co-stars Yolanda Foster, Kyle Richards, Brandi Glanville and Kim Richards for the next season of 'Real Housewives of Beverly Hills'. However, Joyce Giraud and Carlton Gebbia will not be returning for the fourth season, but are expected to return for Season 5.

Not too long ago, rumors emerged about a Vanderpump absence on the upcoming installment of the series, However, she recently took to Twitter to make an announcement and confirm her spot on the cast list.

"Well ok...Five has always been my lucky number, so we will see," she tweeted, "#rhobh Let the games begin."

According to a source who told TMZ, the two were "just not involved enough in the series' story lines to justify their coveted spots in the cast."

Meanwhile, The Wrap says Bravo has tapped Eileen Davidson from 'Days of Our Lives' and 'The Young and the Restless' to join the show.

Davidson has won Outstanding Lead Actress for her role as Kristen DiMera on "DOOL," and will continue to play the role on the hit NBC daytime soap.

On a side note, Davidson will be joining Lisa Rinna who was cast to be on the 'Real Housewives of Beverly Hills' show for its fifth season.

Rinna is best known for her role as Billie in 'Days of Our Lives'. She also appeared on 'Melrose Place', 'Veronica Mars', 'Valerie', 'Dancing With the Stars' and 'Celebrity Apprentice'.