kellan260.jpgHunky Twilight star Kellan Lutz is on a mission to help end dog and cat homelessness in PETA's newest campaign promoting pet adoption.

The usually shirtless star threw on a flannel shirt for the photo shoot and posed with his mixed-breed dog Kola. How cute is that!

Kellan tells PETA, "If anything, I think mutts stay the healthiest. There are surprisingly so many animals in these shelters. It's sad, and knowing that they get euthanized...and there's a lot you can do...spay or neuter your pets so that doesn't happen."

With over 8 million unwanted dogs and cats on the streets here in the U.S., we're lovin' that Kellan is lending his hotness to the cause.

Sink your teeth into that, Twilight fans!