Kaley Cuoco Pops Up On The Voice USA

Viewers of the first episode of The Voice USA had a surprise last night, when The Big Bang Theorystar Kaley Cuocopopped up to support her sister.

Briana Cuoco was shown in a clip on the fifth season premiere of the talent show - with host Carson Daly dropping in on her and Kaley to let her know she'd have the chance to audition in front of the judges.

Adam Levine, Cee Lo Green, Blake Shelton and Christina Aguilera are all back in their spinning red chairs for the new series.

And Access Hollywood took the chance to speak to Kaley's BBT co-stars about Briana at the Emmy Awards.

Jim Parsons said: "We give Kaley a lot of hell like 'Oh so finally the world is going to see the really talented Cuoco!' Which is not true we just want to give her s**t!"

And Mayim Bialik said: "She has a beautiful voice. She is phenomenal. She’s very, very talented."

Briana previously choreographed a flashmob by the show's cast and crew to Call Me Maybe.

Kaley was linked to Henry Cavill earlier this year.