The Internet sensation known as Lil Bub will be in Portland on Sunday for a "meet and greet" with her Pacific Northwest fans.

“She is on tour to allow her fans from afar to meet her and learn how they can help animals in their communities,” says Amanda Giese, founder and president of Panda Paws Rescue.

According to Lil Bub's Facebook page, this fascinating feline is a "perma-kitten," which means that she will maintain kittenish features throughout her life.

Now nearly two years old, Bub was apparently the runt of an otherwise healthy litter from a stray cat in Indiana.

According to her Facebook biography, “BUB was the runt of an otherwise healthy litter from a stray outdoor mother, and was born with several genetic mutations that make her special. She is just one of nature's happy accidents.”

Lil Bub is a dwarf cat, so she has disproportionately small limbs compared to the rest of her body. She has a voracious appetite, despite her differently sized upper and lower jaws and toothless mouth (which explains that adorable pink tongue hanging out).

Some interesting sounds come out of that cute little mouth, including “squonks, squeaks, gurgles, snorts, hiccups, purrs and sometimes even growls.”

Hear them yourself at the event on Sunday, which will take place from 10:30 a.m. to noon on Sunday at LexiDog Boutique & Social Club, 6100 S.W. Macadam Ave. in Portland.

You'll also have the opportunity to purchase items from the Lil Bub store; all proceeds will benefit OHS and Panda Paws Rescue.

For more information about Lil Bub, check out her popular Facebook page, which has attracted nearly 97,000 fans so far.

Lil Bub's lower jaw is much shorter than her upper jaw, and she has no teeth, which cause her tongue to hang out.

--Monique Balas