"She started bathing him, playing with him—he even tried to nurse on her," the owner told Newsweek. "Now they're inseparable.

Gil and Mariko are quite the sibling pair. Gil is the chill older brother, a standard Tabby. He loves mom, he loves playing.

In celebration of International Cat Day, we hope you enjoy these pictures of felines from our archives. Also check out some of our favorite stories about cats: ...