'Real Housewives of Beverly Hills' Castmates Lisa Rinna, Yolanda Foster Sport Identical Dresses at Event

Twinsies alert! The Real Housewives of Beverly Hills castmates Yolanda Foster and newcomer Lisa Rinna showed up at the Carousel of Hope Ball event in Beverly Hills in the same black dress Saturday night.

Both women are beautiful and they looked absolutely stunning in long, black fishnet dresses, but neither of the two reality stars seemed fazed by the alleged mistake.

Foster, 50, and Rinna, 51, have begun filming for the Bravo franchise of The Real Housewives of Beverly Hills, and they've just returned from a film session in Amsterdam, where all the ladies seemed to be getting along great.

Rinna posted the picture of her and Foster on her Instagram, captioning it, "About last night..."

The stars of the 90210 attended the event along with Foster's mega music producer husband David Foster, who served as the music director for the event.

The Carousel of Hope supports research of childhood diabetes and provides the best clinical and educational programs for children who have the disease. The mission is to raise funds in support of the Barbara Davis Center for Childhood Diabetes.

We take that Foster and Rinna have been getting along fine this season, since the two seemed like BFFs during the event. All the housewives have remained pretty hush-hush regarding this season and have told the media we have to stay tuned to see any drama that may or may not unfold.

Kyle Richards, a veteran of the RHOBH, has said she was really sad that Bravo decided to get rid of last season's housewife Joyce Giraud, who has been replaced by Rinna.

"I got along very well with Joyce, so I was sad. I don't like change and I really liked her," she said.

Joining this season, Rinna is known in the soap opera world for her roles as Billie Reed on Days of Our Lives and Taylor McBride on Melrose Place.