Kaley Cuoco is glam in backless dress on night out with sister

Published Thursday, Mar 19 2015, 19:20 GMT  |  By  |  Add comment
The Big Bang Theory's Kaley Cuoco looked smokin' hot in a backless dress while attending a charity night.

The actress - who plays Penny in the hit sitcom - was among the celebrities out to support A Night At Sardi's, an evening in Los Angeles to support the Alzheimer's Association.

Kaley Cuoco and sister Briana at 23rd Annual

© WENN / Zibi

A photo posted by @normancook on

It's an annual night of music performances and celebrity guests which benefits the care, support and research efforts of the Alzheimer's Association.

More than $25 million has been raised so far.

Kaley left husband Ryan Sweeting at home and instead attended alongside musician sister Briana Cuoco, who recently appeared on the US version of The Voice.

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