The world’s most famous cats have united to help save some of their brethren: the planet’s most endangered big cats.

Lil Bub, Princess Monster Truck, Nala Cat and Hamilton the Hipster Cat teamed up with Greenpeace on International Tiger Day to launch Cats Save Tigers, a social media campaign that promotes awareness about the plight of tigers.

With only 3,000 tigers left in the wild, the campaign calls on cat owners to create their own cat memes and share them with the hashtag #CatsSaveTigers to spread the word about this endangered species.

To make your own tiger-saving cat meme, visit CatsSaveTigers.org.

Related on MNN: 10 of the Web's most popular cat memes