Grumpy Cat Alive-ish and Kickin' On Broadway

Grumpy Cat was a thing 3 years ago, but most people thought by now the cat with "issues" was probably in the great litter box in the sky ... not so, she's on Broadway.

Grumpy was held front and center Friday night at the Neil Simon Theater during a performance of "Cats."

As shocking as G.C.'s status ... "Cats" is still on Broadway.