Grumpy Cat, aka Tardar Sauce, took the internet by storm last year after a picture of her cranky-looking face was posted on Reddit.
As well as rising to stardom with more than six million Facebook likes and appearing on the front cover of New York Magazine and The Wall Street Journal, she's released her own single.
People queued around the block last night to meet the four-year-old Persian as she launched her video Cat Sumner and to honour her permanently despondent expression, we've rounded up some other Persian cats who's miserable looks give Tardar a run for her money...
The best grumpy cats
Tardar Sauce's owner Tabatha Bundesen says that her permanently grumpy expression is down to feline dwarfism and an underbite.
But she's not the only Persian cat to look a bit down in the dumps...
The best grumpy cats
This puss may have a beautiful, silky purple backdrop, but Bleugems Believe-in-me (yes, that's its name) look none too happy with its lot at the Supreme Championship Cat Show in Birmingham.
The best grumpy cats
This mixed-breed housecat manages to look both grumpy AND confrontational.
The best grumpy cats
Tizian showing off his irritable-yet-adorable chops at a pet trade fair in Germany.
The best grumpy cats
Some cats just can't help but look like little old men. A fairly grouchy one in this cat's case.
The best grumpy cats
We can almost hear this magnificent cream-furred beauty murmuring a bored "Meeeeeeaaaow".
The best grumpy cats
Oooooh we just want to squeeze his beautiful scrunchy face.
The best grumpy cats
This grumpy feline is also rather suave - the Nigel Havers of the cat world.
The best grumpy cats
Who could deny being a 'cat person' when faced with this adorably miserable little bundle?
The best grumpy cats
We don't know if this Best in Show contestant won over the judges, but his ability to look peeved even while he's sleeping is definitely impressing us.