Bronson Pelletier and Kiowa Gordon
Comment: The first link includes lots of photos and videos of the actors.
Note: Some of us don't consider Booboo Stewart or Julia Jones Native actors.
For more on Twilight, see No Indians in Breaking Dawn Posters and Twilight Video Game?
Below: "Gil Birmingham and Chaske Spencer at the 'Twilight Saga: Breaking Dawn, Part 1' premiere."