[Snickering Hound]

And it gives no explanation as to what could possibly drive Kaley Cuoco to hack her hair off.

[MHGinTN]

Wow! Penny sure improves that ‘little black dress’.

[chaosagent]

She cut it off for a movie this summer, and thought she would wear hair extensions on Big Bang until it grew out, but the show thought the shorter hair fit in with her new career as a pharmacy rep, so she kept it that way.