Scientist think Pluto might have rings based on the size and gravity of Pluto's smallest moons, Nix and Hydra. They think this because their gravity is small, and if something were to hit them, then the debris would be caught into orbit around Pluto.

Pluto's

Nix and Hydra

1

Rings

http://www.universetoday.com/14316/does-pluto-have-rings/