It's National Cat Day, and there's no better way to celebrate—besides, you know, spending time with your cat—than sporting a T-shirt with one of the most stylish and hilarious cats of all-time ...

First video: September 2012 Official T-shirts sold: 100,000 Estimated value of Grumpy Cat, Ltd.: $1 million Lesson: Invest in cats. One Wednesday afternoon this summer, Ben Lashes is standing on ...

Grumpy Cat, the squashy-faced feline that now decorates a thousand mugs, T-shirts and “Grumppuccino” bottles, will star in a Lifetime movie this Christmas — a fact that should surprise no ...

Grumpy Cat attends a book event in Ridgewood, New Jersey, in 2013. Dave Kotinsky / Getty Images file The official Grumpy Cat shop lists 883 items for sale, including books, T-shirts, calendars and ...

Grumpy Cat tops Forbes' ranking of Top Pet Influencers, joining a list that includes such web luminaries as Pomeranian stars Jiff and Boo and precious cats Nala and Lil Bub.

Owner Tabatha Bundesen founded Grumpy Cat Ltd. and created a website that included an online shop featuring 884 items, including T-shirts and mugs with the cat's picture.