If you have not heard of Grumpy Cat, you are behind the times. This Internet sensation is a sweet cat that has one of the grumpiest faces known to catkind in a really hilarious way.

Her face has inspired probably hundreds of sarcastic memes that make their rounds on Facebook and other social media outlets. Her Facebook page has a picture of her with a quote bubble over it saying, “I had fun once. It was awful.”

Well, one clever teen designed a billboard using the infamous Grumpy Cat to encourage teens not to drink at prom.

Go Grumpy Cat! Watch below for the full story.

Grumpy Cat ad encourages teens not to drink at prom
Grumpy Cat says a simple "no" to drinking at prom. Good advice coming from a famous feline.