Camille Grammer and Brandi Glanville. Credit: Patrick Wymore/The CW

When 90210 airs its March 11 episode, Camille Grammer and Brandi Glanville will join a long list of reality stars who have appeared on the CW series. The Real Housewives of Beverly Hills frenemies make a joint cameo in the episode titled "Dude, Where's My Husband?"

Glanville, 40, broke the casting news via Twitter in November 2012. "I just found out I'm going to be on the new 90210 with Camille," she wrote. "So nervous but happy! I can't act. Good thing I'm playing myself." The Bravo reality stars taped their episode in January.

The Hangover-inspired episode features AnnaLynne McCord's Naomi Clark and her pals trying to piece together their night following a raucous booze-fueld bender. Recurring guest star Trevor Donovan also makes an appearance.

The fifth season of 90210 has featured many celebrity guest stars, including Carmen Electra, Ryan Lochte, Wolfgang Puck, Denise Richards, Joey McIntyre, Rita Ora, Terrell Owens and Carly Rae Jepsen. Dozens of other high-profile personalities, including Kim Kardashian and Billy Ray Cyrus, have appeared on the show since its 2008 premiere.

90210 airs Mondays at 9 p.m. EST on The CW. The series will end after five seasons on May 13.