The Voice: Kaley Cuoco's Sister Briana Lands On Team Christina; Big Bang Theory Stars React

“Big Bang Theory” fans got a special treat during “The Voice” on Monday night, as “BBT” star Kaley Cuoco’s little sister, Briana Cuoco, auditioned for the judges.

As Briana belted out Lady Gaga’s “You and I,” getting coaches Christina Aguilera and CeeLo Green to spin their big red chairs around (with Briana eventually opting to join Team Christina), Kaley yelled and cheered from backstage along with her parents.

And while another talented Cuoco might be a surprise to some – it’s something the cast of “The Big Bang Theory” has known about for quite some time.

WATCH: Jim Parsons Raves Over Briana Cuoco

“She has a beautiful voice,” Mayim Bialik told Accesshollywood.com’s Laura Saltman at the Emmys on September 22, when a quick glimpse of Kaley and Briana was used in a season premiere tease for “The Voice.” “She is phenomenal. She’s very, very talented.”

Of course, besides the cast of “BBT,” Briana has also earned the praise of another superstar – her “Voice” coach Christina.

WATCH: Briana Cuoco’s ‘The Voice’ Audition

“Loved the way #Bri got the crowd amped during her performance! So happy to have her on #TeamXtina,” Christina Tweeted on Monday night.

Unfortunately for the Sisters Cuoco, there was a bit of backlash following the airing of Briana’s stellar audition, with some suggesting she only made it through due to her famous sister.

“FYI last nights #TheVoice was NOT rigged because I’m @bricuoco sis. She made it ON HER OWN 100%. It’s called BLIND AUDITIONS for a reason,” Kaley emphatically Tweeted on Tuesday, adding in a Tweet to her sister “I set em straight!”

-- Eric Anderson

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